Electro-Koopa

Electro-Koopas are Koopas in Super Mario Sunshine with blue shells on their back that are electric and walk on all fours. They mostly appear in Pinna Park and also appear in the King Boo fight.

To attack they will throw their shells at Mario so Mario has to avoid it, or he'll get Electrified. The shell will fly back onto them like a boomerang. To defeat them, spray water on their bodies to distract them just before their shell comes back so that they get electrified or simply stomp on it.

There are also red versions of the Electro-Koopa. They appear in Pinna Park and Pianta Village where they climb on metal screens. To defeat them, Mario should kick, punch, or Ground Pound them from the other side of the screen. When this happens, they fly off into oblivion. They attack with electricy.

There is also a green version that a lot larger is than normal ones. It slept atop the ferris wheel in Pinna Park. It might be a leader among the Electro-Koopas. Mario had to defeat it in the same way as the red Electro-Koopas. It'll then fall in the water, then a Shine Sprite appears, and the ferris wheel is at normal speed.

Trivia

 * A shell-less Electro-Koopa appears in the board game Nintendo Monopoly.