Specter Inspector

From the Super Mario Wiki

Specter Inspector is a Duel Mini-game featured in Mario Party 8. The players' goal is to find three enemies (which will be either a Koopa Troopa, Penguin, Goomba, Bob-omb, Koopa Paratroopa, or even an Amp) before their opponent. To find them, the player must walk around the room and shine their flashlight on objects that seem to be rapidly shaking. Either an enemy will be found, or a Luigi's Mansion ghost will appear. Ghosts waste time, and they do not count toward the player's score.

Mini-games from Mario Party 8 4-player mini-games Alpine Assault · At the Chomp Wash · Crank to Rank · Flip the Chimp · In the Nick of Time · Kartastrophe · Lava or Leave 'Em · Mario Matrix · Mosh-Pit Playroom · Punch-a-Bunch · Rudder Madness · Scooter Pursuit · Shake It Up · Sick and Twisted · Speedy Graffiti · Swing Kings · Treacherous Tightrope · Water Ski Spree 1-vs-3 mini-games Bob-ombs Away · Chump Rope · Grabbin' Gold · Gun the Runner · Picture Perfect · Power Trip · Snow Way Out · Swervin' Skies · Thrash 'n' Crash 2-vs-2 player mini-games Boo-ting Gallery · Bumper Balloons · Crops 'n' Robbers · Grabby Gridiron · King of the Thrill · Lean, Mean Ravine · Paint Misbehavin' · Rowed to Victory · Sugar Rush · Winner or Dinner Battle mini-games Aim of the Game | Cut from the Team · Glacial Meltdown · Saucer Swarm · Snipe for the Picking Challenge mini-games Fruit Picker · Pour to Score · Stampede Duel mini-games Attention Grabber · Balancing Act · Blazing Lassos · Breakneck Building · Cardiators · Cosmic Slalom · Eyebrawl · Frozen Assets · Ion the Prize · Lava Lobbers · Lob to Rob · Loco Motives · Pumper Cars · Rotation Station · Saucer Swarm · Settle it in Court · Specter Inspector · Surf's Way Up · Wing and a Scare · You're the Bob-omb Extra Zone mini-games Star Carnival Bowling · Trial by Tile · Flagging Rights · Canyon Cruisers · Table Menace · Puzzle Pillars · Chomping Frenzy · Moped Mayhem The Last mini-game Superstar Showdown