Mega Cheep Chomp's Shell Shock is a boss minigame that appears in Mario Party 10. The midboss minigame of Whimsical Waters, it pits the players against a Mega Cheep Chomp.
Intro
The minigame takes place in a lake surrounded by rocky cliffs. Each player mans a small cannon with three Green Shells loaded on the side as Mega Cheep Chomp swims in and out of view far below. Finally, Mega Cheep Chomp bursts out of the water, snapping its jaws. The players jump as the fish lands back in the water, turning to face a random player as the minigame begins.
Gameplay
Players have 10 seconds to shoot Mega Cheep Chomp with their Green Shells. However, each shot makes the boss turn clockwise to face the next player in its path; when time runs out, it will charge forward and tackle its current target, making them lose a point. Since each player only has three shells per round, an element of strategy is required to prevent them from losing points; they must balance their scoring with ensuring that Mega Cheep Chomp won't be facing them when it attacks.
At half health, Mega Cheep Chomp will begin each round with two or three Cheep-Cheep helpers swimming around it; the Cheep-Cheeps can block shells fired at the boss, thereby making timing another factor in player strategy.
The minigame ends once the Mega Cheep Chomp's HP drops to 0 - the player who lands the final blow gains an additional 3 points. After the boss is defeated, the result screen is shown with a sum of points, penalties and bonuses. The player with the most points overall wins the minigame.