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{{about|instances of regular Koopa Troopa shells|more information on the colored varieties with distinct properties|[[Shell]]}}
{{item infobox
|image=[[File:GreenShell - MarioPartyStarRush.png|200px]]
|first_appearance=''[[Super Mario Bros.]]'' ([[List of games by date#1985|1985]])
|latest_appearance=''[[nookipedia:Animal Crossing: New Horizons|Animal Crossing: New Horizons]]'' (version 1.8.0) (2021)<br>''[[Super Mario 3D World + Bowser's Fury]]'' ([[List of games by date#2021|2021]], ''Mario'' franchise)
}}

'''Koopa Shells'''<ref>NES Game Atlas Nintendo Player's Guide, page 12.</ref><ref>''Super Mario 64'' English instruction booklet, page 18.</ref> (also known as '''Turtle Shells'''<ref>''Nintendo Power'' Volume 1, page 9.</ref> or simply '''shells'''<ref>''Super Mario All-Stars'' instruction booklet, page 20.</ref>) are items that are typically obtained from [[Koopa Troopa]]s and their related species. Some of them are obtained by [[jump]]ing on a Koopa Troopa and getting its shell, other instances have players use them independent of Koopa Troopas. They are typically used by being sent in a straight line, spinning around, and eliminating obstacles, and they can retrieve helpful collectibles for the player.

==History==
===''Super Mario'' series===
====''Super Mario Bros.''====
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Koopa Shells first appear in ''[[Super Mario Bros.]]'' and its various rereleases such as ''[[Super Mario All-Stars]]''. After a Koopa Troopa is hit by a jump attack, it retreats into its shell, leaving it for [[Mario]] to use. Upon contact, the shell is launched, defeating every enemy in its way. However, this can also backfire when the shell rebounds from any obstacle. A shell in motion can be stopped by stomping on it. If a Koopa Troopa is seen wearing a green shell, it falls off ledges if it reaches one. If it wears a red shell, it turns around when reaching a ledge. The Koopa Troopa stays in the shell for only a limited amount of time. After a while, the Koopa Troopa gets out of its shell and resume walking. Koopa shells can be destroyed by a fireball shot by Fire Mario or being hit by Invincible Mario. In the original version, their color changes to teal in underground or castle levels, though in the ''Super Mario All-Stars'' remake, they are colored normally.

====''Super Mario Bros.: The Lost Levels''====
Koopa Shells behave identically in ''[[Super Mario Bros.: The Lost Levels]]''. A gray palette has been introduced for green shells found in underwater levels, though they are colored normally in ''Super Mario All-Stars''.

====''Super Mario Bros. Special''====
As ''[[Super Mario Bros. Special]]'' is another follow-up to the original ''Super Mario Bros.'', Koopa Shells behave identically. In NEC PC-8801 versions of the game, red shells are rendered normally while green shells have reversed palettes.

====''Super Mario Bros. 2''====
[[File:Red Shell SMB2 Sprite.png|frame|left]]
Turtle shells are found in ''[[Super Mario Bros. 2]]'', where they replace the {{wp|blackface}} head-like objects known as "Big Face" (ビッグフェイス<ref>''Yume Kōjō: Doki Doki Panic'' instruction booklet, page 24.</ref>) from ''[[Yume Kōjō: Doki Doki Panic]]''. They are plucked from the [[grass]] and can be thrown - the Shell slides forward, defeating most enemies it hits, until it makes contact with a wall and disappears. It is possible to actually get on top of the shells and ride them.

''[[Super Mario Advance]]'' makes them larger (and thus take longer to pluck). They are also more similar to regular Koopa Shells, as they rebound off walls instead of disappearing, and hurt the player if they touch the shell's sides; a [[heart]] also appears for each enemy it defeats.

====''Super Mario Bros. 3''====
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Koopa Shells return in ''[[Super Mario Bros. 3]]'' and [[Super Mario Advance 4: Super Mario Bros. 3|its remake]] and serve the same purpose as in the first game. The Shells can now also be grabbed and carried around before they are thrown. They can be used to hit blocks on their sides. [[Giant Green Shell]]s also debut in this game's [[Giant Land|World 4]].8

====''Super Mario World''====
[[File:SMW Mario kicking a shell.jpg|thumb|300px|Mario kicking a shell into [[Galoomba|Goombas]] from ''[[Super Mario World]]''.]]
Koopa Shells appear in ''[[Super Mario World]]'' and [[Super Mario Advance 2: Super Mario World|its remake]]. However, instead of the Koopa Troopa retracting back into its shell, [[Beach Koopa|it slides out of its shell]]. If the Koopa finds its shell again, it goes back inside it. Blue unshelled Koopa Troopas do not go inside shells and kick them towards players. Some shells encountered do not contain Koopa Troopas inside them: this is indicated by the lack of glowing eyes inside them. Four types of shells appear in ''Super Mario World'', all with varying effects. [[Green Shell]]s do not give [[Yoshi (species)|Yoshis]] who eat them any additional abilities, [[Red Shell]]s allow Yoshis to spit out fire, [[Blue Shell]]s allow Yoshis to temporarily sprout wings and fly, and [[Yellow Shell]]s allow Yoshis to emit sand clouds when stomping the ground. In addition, a Koopa Troopa that goes into a yellow shell becomes a [[Shell (flashing)|Flashing Shell]] and invulnerable to any attacks. Shells retain their vulnerability to fireballs, but they also can be destroyed if they are [[Spin Jump]]ed on or if a Yoshi stomps on them.

After the player beats the [[Special Zone]] (or completes all 96 exits in ''Super Mario Advance 2: Super Mario World''), all Koopa Shells become [[Fall|Mario masks]].

====''Super Mario Land 2: 6 Golden Coins''====
Koopa Shells can be used as items in ''[[Super Mario Land 2: 6 Golden Coins]]'', behaving as they did in past entries. Due to the limitations of the [[Game Boy]], all shells appear grayscale.

====''Mario Bros.''====
In the ''Super Mario All-Stars'' version of ''[[Mario Bros. (game)|Mario Bros.]]'', a single Koopa Troopa spawns as an enemy in the Battle Game mode in every round and their shells can be used as weapons towards other players, though their shells only knock enemies up rather than defeat them.

====''Super Mario 64'' / ''Super Mario 64 DS''====
[[File:Flaming Silver Stars.png|thumb|left|Luigi riding on a Koopa Shell in ''Super Mario 64 DS'']]
'''Koopa Shells''' are rare objects in ''[[Super Mario 64]]''. Some, also referred to as '''Shiny Shells''',<ref>M. Arakawa. ''Super Mario 64'' Player's Guide. Page 8.</ref><ref>(February 24, 1998). [https://web.archive.org/web/19980224194049/http://www.nintendo.com/n64/super_mario64/items.html Items]. ''Nintendo: Super Mario 64 Strategy'' (Internet Archive: Wayback Machine). Retrieved February 23, 2018.</ref> can be obtained by hitting some [[! Block|yellow block]]s or attacking a [[Koopa Troopa|Koopa]] to get it out of its shell. When Mario [[jump]]s on a Koopa Shell, he can travel at fast speed and ram into enemies to defeat them instantly. Riding a shell also allows Mario to navigate over [[lava]] or water. Additionally, if Mario grabs a Koopa Shell while underwater, he can hold the shell in front of him and use it to [[swim]] faster in water for a short period of time. When he rides on a Koopa Shell, the theme that plays is the one used for the [[Wing Cap]] and [[Vanish Cap]].

Koopa Shells make a return in ''[[Super Mario 64 DS]]'', where they can be ridden on (and used underwater) once again. Additionally, they may appear behind some brick blocks as well. Yoshi can eat Koopa Shells and spit them out, although they disappear upon hitting a wall. Some [[minigame]]s found in ''Super Mario 64 DS'' require use of a Koopa Shell, such as [[Shuffle Shell]].

In the original version, when the player hits the yellow blocks for Koopa Shells, the boxes do not respawn, but shells do not disappear until Mario hitches a ride on one. In the DS version, [[! Block]]s have the ability to respawn and, unless they were stolen from Koopa Troopas, shells now disappear if not used for a while.
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====''New Super Mario Bros.''====
Koopa Shells return in ''[[New Super Mario Bros.]]'', in which they can be obtained after stomping on a Koopa Troopa. Just like in ''Super Mario Bros.'', the Koopa Troopa retracts into its shell so Mario can grab the shell and throw it. Aside from the design change, the shells have little change in its function. Performing a [[Ground Pound]] on a Koopa Troopa or Paratroopa kicks its shell forwards without having to pick it up. [[Blue Shell]]s return in this game as power-ups that let Mario slide across levels as a kicked shell.

In addition, [[Bowser Jr.]] throws green shells during certain boss fights (specifically when his bandanna is on). The player must step on the green shell, pick it up, and throw it back at Bowser Jr. to stun him. Once stunned, the player can then attack Bowser Jr. by either jumping on him or Ground Pounding him.

====''New Super Mario Bros. Wii''====
[[File:NSMBW Mario Holding Green Shell Artwork.png|thumb|Mario holding a Koopa Shell from ''New Super Mario Bros. Wii''.]]
Shells make an appearance in ''[[New Super Mario Bros. Wii]]''. They have the same function as in ''New Super Mario Bros.'', although there is one difference. Holding the {{button|wii|1}}/{{button|wii|Z}} and shaking {{button|wii|Wiimote}} allows players to carry it over their head, which can then be thrown in the same way as holding and throwing it normally. If [[Ice Mario]] attacks a Koopa Troopa after stomping on it, the Koopa Troopa remains frozen within its shell in an [[Ice Block]]. Mario can then use the Ice Block like a platform or lift it up to throw the block and destroy the shell. Also, larger green shells appear in [[World 5 (New Super Mario Bros. Wii)|World 5]]. Mario can enter these larger shells and find hidden items.

====''Super Mario Galaxy'' / ''Super Mario Galaxy 2''====
Three types of Koopa Shells appear in ''[[Super Mario Galaxy]]'': Green Shells, Red Shells, and [[Gold Shell]]s. Some shells can be retrieved from Koopa Troopas, though most can be found independently of them. They can be used as projectiles to destroy enemies and certain objects, and they can be used to help Mario or Luigi swim underwater. Shells underwater propel Mario or Luigi, and they emit a light to help them see in the dark as well as defeat enemies such as [[Boo]]s. Brake lights appear if Mario or Luigi brakes the shell.

In ''[[Super Mario Galaxy 2]]'', Green Shells are the only returning shell.

====''New Super Mario Bros. 2''====
Koopa Shells reappear in ''[[New Super Mario Bros. 2]]'' with the same function as in the past ''New Super Mario Bros.'' installments. However, if Mario passes through a [[Gold Ring]], any Koopa Troopas in the area turn Golden, and so do [[Gold Shell|their shells]]. If thrown, they produce a trail of [[coin]]s behind them.

====''Super Mario 3D Land''====
Koopa Shells reappear in ''[[Super Mario 3D Land]]'' with the same function as in other games; however, only green-colored shells appear again, and characters can only kick shells and not throw them. If Mario or Luigi shoot [[fireball]]s or [[Tanooki Mario|tail whip]] a shell, it bounces slightly and a jingle plays. If this is done five times without the shell touching the ground, it breaks and produces a [[1-Up Mushroom]].

====''New Super Mario Bros. U'' / ''New Super Luigi U''====
Koopa Shells reappear in ''[[New Super Mario Bros. U]]'', ''[[New Super Luigi U]]'', and their [[New Super Mario Bros. U Deluxe|port]] with the same function as in the past installments. [[Giant Green Shell]]s also reappear.

====''Super Mario 3D World''====
A Green Shell is a wearable item in ''[[Super Mario 3D World]]'' and [[Super Mario 3D World + Bowser's Fury|its port]], where they can either be found as standalone items or taken from Koopa Troopas. They can also be thrown to defeat enemies and destroy obstacles, and they travel through [[Clear Pipe]]s.

====''Super Mario Maker'' series====
Koopa Shells are generated from Koopa Troopas in in ''[[Super Mario Maker]]'', ''[[Super Mario Maker for Nintendo 3DS]]'', and ''[[Super Mario Maker 2]]'', with properties intact depending on the game style they are in. Green shells are the default variant for a Koopa Troopa, though if shaken, they turn red. When they are enlarged, Koopa Shells can break through blocks without bouncing. Koopa Shells are able to bounce on Trampolines and Note Blocks.

====''Super Mario Run''====
Koopa Shells reprise their role in ''[[Super Mario Run]]'', where the playable character automatically kicks the shell if they stomped on a Koopa Troopa.

===''Mario Clash''===
[[File:MarioThorny.png|thumb|left|Mario sending a Turtle Shell to a Thorny in ''Mario Clash''.]]
Turtle Shells are obtained from stomping on Koopa Troopas in ''[[Mario Clash]]'', and they are used to defeat otherwise unstompable enemies such as [[Thorny|Thornies]]. Mario can either send Turtle Shells across the screen to hit enemies or send them into the side [[Warp Pipe]]s.

===''Yoshi'' series===
====''Yoshi''====
[[File:YoshiNES-RedShell-BType.png|frame|right]]
A red Koopa Shell makes a small appearance in the NES version of ''[[Yoshi (game)|Yoshi]]'' after the player clears level 4 of the B-Type game, rewarding the player 400 points.

====''Yoshi's Cookie''====
A Koopa Shell appears as one of the cookies in ''[[Yoshi's Cookie]]'' when playing Rounds 11-99. Since there is only one per level, this makes for a more challenging experience as the only way to get rid of the shell cookie is to pair it up with a Yoshi Cookie, which is further complicated by the placement of the other cookies.

====''Yoshi's Safari''====
Koopa Shells appear as enemies in ''[[Yoshi's Safari]]''.

====''Super Mario World 2: Yoshi's Island''====
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Green and red Koopa Shells appear in ''[[Super Mario World 2: Yoshi's Island]]'' and [[Yoshi's Island: Super Mario Advance 3|its remake]], where a Yoshi can obtain them by stomping on Koopa Troopa, which causes them to fly out of their shell and become Beach Koopas. They can be carried by Yoshis in their mouths, but Yoshis cannot swallow them to make eggs due to them being hard and inedible. These shells act in the same manner as in ''Super Mario World'' and can be used to break obstacles and activate [[Winged Cloud]]s. The shells can still hurt Yoshis when it slides around and touches them.

====''Yoshi's Island DS''====
Both green and red Koopa Shells re-appear in ''[[Yoshi's Island DS]]'' and function identically as their appearance in ''Super Mario World 2: Yoshi's Island'', where they are still inedible and can be used to attack enemies and break obstacles.

====''Yoshi's New Island''====
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Koopa Shells reprise their functionality in ''[[Yoshi's New Island]]'' and have an updated appearance alongside the Koopa Troopas that wear them, where they can be used to solve puzzles and obtain [[Smiley Flower]]s in [[Koopa Canyon]] and [[Spin-Lift Drift]]. Red shells appear before green shells.

====''Yoshi's Wooly World''====
Koopa Shells take on a yarn appearance in ''[[Yoshi's Wooly World]]'' and [[Poochy & Yoshi’s Woolly World|its port]], and they are spawned from Koopa Troopas. 8-bit Koopa Shells can sometimes be found in walls with strings. When Yoshi licks the strings, the Koopa Shell will come out and it can be used as a normal shell.

====''Yoshi's Crafted World''====
Koopa Shells appear only in [[Many Fish in the Sea]] in ''[[Yoshi's Crafted World]]'', reprising their role from prior entries in the ''Yoshi'' franchise.

===''Mario Kart'' series===
[[File:Mario Kart 8 - Shell Cup logo.svg|thumb|The Shell Cup logo from ''[[Mario Kart 8]]''.]]
Two types of Koopa Shells have appeared in every main ''[[Mario Kart (series)|Mario Kart]]'' installment since ''[[Super Mario Kart]]'': the Green Shell and Red Shell. The blue [[Spiny Shell (blue)|Spiny Shell]] and triple variants of the Green and Red Shells are added in ''[[Mario Kart 64]]'', while the [[Black Shell]] and Gold Shell are exclusive to the ''Mario Kart Arcade GP'' installments. Installments after ''[[Mario Kart DS]]'' portray the first past course cup as [[Shell Cup]].

===''Super Mario RPG: Legend of the Seven Stars''===
A green Koopa Troopa shell, mistranslated as the '''NokNok Shell''', appears as a weapon usable by Mario in ''[[Super Mario RPG: Legend of the Seven Stars]]''. It has an attack power of 20 points, with a deviation of up to 2 points above or below. The NokNok can be obtained from the [[Toad (species)|Mushroom]] man found at the bottom of the [[Midas River]] course after getting enough [[coin]]s in it. It can also be bought at [[Seaside Town]], though far more powerful weapons are available by then.

When attacking with the shell, Mario kicks it upwards and then kicks it again at a single enemy. To get a [[Action Command|timed hit]], the player needs to press the button as he is performing the second kick. Similar weapons include the [[Troopa Shell]] and the [[Lazy Shell]].

===''Mario Party'' series===
[[File:MPA ShellStack.png|thumb|left|[[Princess Peach]] jumping on Koopa Shells in Shell Stack from ''Mario Party Advance''.]]
Koopa Shells make various appearances in minigames, such as appearing as an icon in [[Slot Trot]] in ''[[Mario Party 6]]'' and being emitted out of pipes in [[Shell Stack]] in ''[[Mario Party Advance]]''. In ''[[Mario Party: Island Tour]]'', an item called the Setback Shell, modeled after the Green Shell, is a usable item in [[Perilous Palace Path]].

===''Mario Tennis'' series===
Green and Red Shells reprise their role from the ''Mario Kart'' series into the Item Battles of the ''[[Mario Tennis (series)|Mario Tennis]]'' series, where Green Shells fly in groups of three in a straight line while Red Shells home into opponents.

In ''[[Mario Tennis Open]]'', the [[Shell Cup]] is an available cup. Additionally, in [[Super Mario Tennis]], Koopa Shells can be used and act similarly to their counterpart in ''Super Mario Bros.''

===''Paper Mario'' series===
Koopa Shells reappear in the [[Paper Mario (series)|''Paper Mario'' series]], where they are donned by Koopa Troopas. A type of Koopa Shell called a [[Courage Shell]] can be bought from [[Petalburg]] and [[Flipside]], stolen from [[Koopa Paratroopa]]s, or cooked by [[Zess T.]] and [[Saffron]] in ''[[Paper Mario: The Thousand-Year Door]]'' and ''[[Super Paper Mario]]'' respectively. In ''Super Paper Mario'', there is an item called [[Shell Shock (item)|Shell Shock]], which is a giant 8-bit green shell (appearing in its design from ''[[Super Mario Bros.]]'') which can be used to attack enemies the same way as a Koopa Shell would. However, the Shell Shock can still hit the heroes and cause damage.

In ''[[Paper Mario: The Origami King]]'', in the [[Earth Vellumental Temple]], Koopa Shells appear in battle. If Mario jumps on one, it gets launched forward, damaging the rest of the enemies in that row.

===''Super Smash Bros.'' series===
While Green Shells and Red Shells are classified as their own items in the [[Super Smash Bros. Series|''Super Smash Bros.'' series]], generic green and red Koopa Shells can be retrieved from defeating Koopa Troopas and used in the first stage of the Adventure Mode in ''[[Super Smash Bros. Melee]]'', where they have no gameplay differences from each other. The Spiny Shell is added as an item to the ''Super Smash Bros.'' series after ''[[Super Smash Bros. for Nintendo 3DS / Wii U]]''.

===''Dance Dance Revolution: Mario Mix''===
[[File:DDRMMKoopa.jpg|thumb|200px|A Koopa Troopa and using its shell from ''Dance Dance Revolution: Mario Mix''.]]
In Mush Mode of ''[[Dance Dance Revolution: Mario Mix]]'', a Koopa Shell is spawned when players step on a Koopa Troopa. The player needs to either step on the shell again to destroy it or, if they hit a perfect, send it down the screen to destroy an upcoming arrow.

===''Mario Baseball'' series===
Red and Spiny Shells appear as one of the items in the Toy Field mode of ''[[Mario Superstar Baseball]]'' whenever a slot machine activates by a ball landing on a ? space. In ''[[Mario Super Sluggers]]'', Green Shells are the only Koopa Shell that are Error Items.

===''Super Princess Peach''===
Koopa Shells also appear in ''[[Super Princess Peach]]''. They can be obtained by knocking Koopas out of their shells, allowing Peach to throw it to attack enemies. Every consecutive enemy Peach hits with the shell can leave coins and [[5 Coin]]s in their wake.

===''Mario & Luigi'' series===
Green and Red Shells appear as [[Bros. Item]]s and [[Bros. Attack]]s in various titles from the ''[[Mario & Luigi (series)|Mario & Luigi]]'' series. They spawn an empty Koopa Shell, which can be used to hit into enemies multiple times. Green Shells tend to be the first Bros. Item or Bros. Attack the Mario Bros. receive.

===''Mario Hoops 3-on-3''===
Green, Red, and Spiny Shells can be retrieved by the defensive team if they run across [[? Panel]]s in ''[[Mario Hoops 3-on-3]]'', where these shells mimic their role in the ''Mario Kart'' series.

===''Mario Strikers'' series===
Three types of Koopa Shells appear in the ''[[Mario Strikers (series)|Mario Strikers]]'' series: Green, Red, and Blue Shells. Green Shells stun opponents, Red Shells home into opponents, while Blue Shells freeze opponents. All three of these shells receive giant variants as well. In ''Mario Strikers Charged'', Koopa Troopa's [[skillshot]], the [[Shell Smash (move)|Shell Smash]], involves using a giant white shell.

===''Mario & Sonic'' series===
[[File:RhythmicGymnasticsPlus.png|thumb|left|Koopa Shells in Rhythmic Gymnastics Plus from the Nintendo 3DS version of ''Mario & Sonic at the Rio 2016 Olympic Games''.]]
Green and Red Shells, which mimic their roles from the ''Mario Kart'' series, are usable items in various racing Dream Events in the ''[[Mario & Sonic (series)|Mario & Sonic]]'' series.

During the [[Dream Hurdles]] event in the [[Wii]] version of ''[[Mario & Sonic at the London 2012 Olympic Games (Wii)|Mario & Sonic at the London 2012 Olympic Games]]'', two Koopa Shells can appear if the player pushes a ? Switch. Getting hit with one results the player losing five points. Despite Koopa Shells not physically appearing in the [[Nintendo 3DS]] [[Mario & Sonic at the London 2012 Olympic Games (Nintendo 3DS)|version]], a [[List of badges in Mario & Sonic at the London 2012 Olympic Games (Nintendo 3DS)|badge]] featuring one alongside a Red Shell can be obtained from the badge machine.

In the [[Nintendo 3DS]] version of ''[[Mario & Sonic at the Rio 2016 Olympic Games (Nintendo 3DS)|Mario & Sonic at the Rio 2016 Olympic Games]]'', green shells occasionally appear to uncover upcoming buttons in [[Rhythmic Gymnastics Plus]].

===''Mario Sports Mix''===
Green and Red Shells return from ''Mario Hoops 3-on-3'' in ''[[Mario Sports Mix]]'', reprising their roles, plus they can be combined with the ball or puck for a more powerful throw with their properties in the item.

===''Mario Golf: World Tour''===
In ''[[Mario Golf: World Tour]]'', [[Mario]] and [[Gold Mario]] get hit by a Koopa Shell and power down in their double bogey animations.

===''Nintendo Badge Arcade''===
Koopa Shells are collectible badges in the [[Nintendo Badge Arcade]] application. They appear in the ''Super Mario Bros.'', ''Super Mario Maker'', Mario & Friends, and ''Mario Kart 8'' sets.

===''Mario Sports Superstars''===
[[File:MetalMarioDoubleBogey.png|thumb|Metal Mario buried in Koopa Shells from ''Mario Sports Superstars''.]]
Koopa Troopas appear as enemies in the Road to Superstar in ''[[Mario Sports Superstars]]'', and their shells can be used as makeshift equipment with the other items to break objects once they are defeated.

In the golf mode, which recycles animations from ''Mario Golf: World Tour'', [[Metal Mario]] gets buried in Koopa Shells if he scores a double bogey.

===''Dr. Mario World''===
Shells of seven colors appear in ''[[Dr. Mario World]]''. When activated by matching three of a same-colored  capsule, they move to the left and then the right, destroying [[virus|viruses]] in its path and activating [[Brick Block]]s, though they cannot activate another shell. [[Empty Block]]s block shells. [[Baby Luigi|Dr. Baby Luigi]] and [[Nabbit|Dr. Nabbit]] can change viruses into shells, while the [[Paragoomba]], [[Para-Beetle]], [[Buzzy Beetle]], [[Boomerang Bro]], and [[Urchin]] assistants all grant chances for shells to spawn in some conditions.

===Other appearances and references===
[[File:Green Shells in TLoZ Phantom Hourglass.png|thumb|left|[[Link]] fighting three Terrorpins]]
A green Koopa Shell is one of the collectible treasures that [[Kirby]] can find in "The Great Cave Offensive" mode of the games ''[[Wikirby:Kirby Super Star|Kirby Super Star]]'' and ''[[Wikirby:Kirby Super Star Ultra|Kirby Super Star Ultra]]''. The Koopa Shell is found in the Old Tower Area of the Great Cave, and is worth 800 Gold. It is referred to as the "Turtle Shell" in ''Kirby Super Star'', but correctly called the "Koopa Shell" in ''Kirby Super Star Ultra''.

In the ''[[nookipedia:Animal Crossing (series)|Animal Crossing]]'' series, Green and Red Shells appear as furniture items. They originally use their ''Super Mario Bros.'' appearance, though they use their modern appearance in ''[[nookipedia:Animal Crossing: New Leaf|Animal Crossing: New Leaf]]''.

[[zeldawiki:Terrorpin|Terrorpins]], an enemy from the [[zeldawiki:The Legend of Zelda (Series)|''The Legend of Zelda'']] series, appear in [[zeldawiki:The Legend of Zelda: Phantom Hourglass|''The Legend of Zelda: Phantom Hourglass'']] with a Koopa Shell-like design, appearing as enemies in [[zeldawiki:Mutoh's Temple|Mutoh's Temple]]. They can only be defeated by using the Hammer near them and flipping them over.

In [[Super Mario Chess|''Super Mario'' Chess]], Green Shells appear as pawns on Bowser's team.

If the [[? Block|Question Block]] AR Card is used in the Fishing minigame included as part of the [[AR Games]] software on the [[Nintendo 3DS]], and the card is placed on a green surface, Koopa Shells will rain down upon the water. The shells can also be caught by the player.

In ''[[Monopoly Gamer]]'', there is a Koopa Shell side on the "Power-Up Die". Rolling it normally forces the next player on a space forward from the player's position (player's choice if multiple players occupy the space) to drop three Coins on that space, where the next player who lands on or passes that space can pick them up. Some characters have a "Power-Up Boost" that enhances or changes this power.

In ''[[Minecraft]]'', Turtle Shells are changed to resemble Koopa Shells in the Super Mario Mash-up.

==References==
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