| A. Coz | |
|---|---|
 Mario Tennis artwork for A. Coz (front) and B. Coz | |
| Full name | A. Costello |
| Species | Human |
| First appearance | Mario Tennis (2000) |
| Latest appearance | Mario Tennis: Power Tour (2005) |
Template:Quote2 A. Coz (full name A. Costello) is a character in the Game Boy Color version of Mario Tennis, and the oldest of the three Costello brothers. Unlike his partner, B. Coz, he is a tricky player that can curve the ball immensely. In Singles, the player faces A. Coz in the final round of the Island Open. Like the player, it is his first time in the tournament.
In Mario Tennis: Power Tour, which takes place several years later, he and B. Coz are revealed to be coaches at Factory. Their younger brother, Willy, is the player's final opponent in the Island Open.
A. Coz's name comes from the French term "à cause" which roughly means "because", the basis for B. Coz's name.
| Mario Tennis (Game Boy Color) | ||
|---|---|---|
| Playable characters | Default | Luigi • Baby Mario • Donkey Kong • Allie • Joy • Brian • Alex • Harry • Nina • Kate |
| Unlockable | Mario • Peach • Yoshi • Wario • Waluigi • Bowser • Pam • Bob • Beth • Fay • Curt • Mark • Sammi • Sean • Spike • Elden • Emily • A. Coz • B. Coz | |
| Non-playable characters | Ball Bot • Bob-omb • Boo • Daisy • Edgar • Ellis • Frank • Great Fairy of Victory • Headmaster • Kevin • Toad | |
| Courts | Hard Court • Clay Court • Grass Court • Composition Court • Castle Court • Tropics Court • Jungle Court • Star Court • Warehouse Court | |
| Schools | Empire • Factory • Royal Tennis Academy • Union | |
| Minigames | Shooting Star • Target Shot • Banana Bunch • Boo Blast • Perfect Shot • Fruit Factory • Treasure Box • Medallion Match • Two-on-One | |
| Mario Tennis: Power Tour | ||
|---|---|---|
| Playable characters | Default | Mario • Princess Peach • Luigi • Waluigi • Donkey Kong • Bowser • Clay • Ace |
| Unlockable | Sophia • Meg • Mason • Chad • Sasha • Sylvia • Chris • Kyle • Shawn • Linda • Gary • Jet • Kyoko • Micki • Emi • Roy • Flit • Skipper • Whisker • Paula • Elroy • Tori • Barb • Sass • Chas • Mel • Dweezil • Mynx • Willy • Sheri | |
| Non-playable characters | Leon • Peter • Oscar • Chet • Alex • Harry • Nina • Kate • Mark • Emily • Kevin • A. Coz • B. Coz • Headmaster • Samantha • Shadow Swing King • Shadow Swingstress • Great Fairy of Victory • Toad • Toadsworth • Pianta • Noki | |
| Courts | Hard Court • Clay Court • Grass Court • Composition Court • Peach Dome | |
| Locations | Royal Tennis Academy • Island Open • Empire • Factory • Union • Tennis Academy Restaurant • Tennis Academy Training Center • Mario World | |
| Minigames | Bicep Pump • Duck Walk • Instinct Drill • Jump Gym • Reflex Rally • Rope Climb • Swift Spin • Tacklebot • Tennis Machine • Tightrope • Treadmill • Wall Practice | |
| Power Shots | Offensive | Iron Hammer • Super Peach Spin • Squeaky Mallet • Whirluigi • Barrel Cannon Blast • Fire Breath • Curve Shot • Power Shot • Slider Shot • Tackle Shot • High-Power Shot • Blizzard Shot • Control Shot • Flying Shot • Stunner Shot • Flashflop Shot • Summoner Shot • Gyro Shot • Dragon Shot • Sonic Shot • Specter Shot • Volcano Shot |
| Defensive | Spin Jump Return • Sweet Kiss Return • Poltergust Return • Swimming Return • Boomerang Banana Return • Spinning Shell Dash • Quick Save • Running Save • High-Jump Save • Typhoon Save • Bubble Save • Quick-Step Save • Superswift Save • Hand-Power Save • Bubble Save • Illusory Save • Spider Save • Falcon-Dive Save • Shark-Bite Save • Shooting-Star Save • Rainbow Save | |