Acro

Acro is a killer whale from the Kirby series. He first appeared in the Super Nintendo Entertainment System video game Kirby's Dream Land 3, though also appeared in the Nintendo 64 title Kirby 64: The Crystal Shards. It is a boss enemy that is under the control of Dark Matter, technically not making him an enemy to Kirby.

Acro backwards is Orca, the type of whale the boss is.

Kirby games

 * Kirby's Dream Land 3: Acro's first appearance in a video game. It jumped out of the sea below Kirby and attempted to attack him. When this happened Kirby was required to attack it. The second phase of the battle takes place in the water.
 * Kirby 64: The Crystal Shards: The battle in The Crystal Shards is similar to the second phase in Kirby 's Dream Land 3.

Other appearances

 * Super Smash Bros. Brawl: The artwork from Kirby 64: The Crystal Shards is used as a sticker in the Wii video game Super Smash Bros. Brawl. When placed on the bottom of Princess Peach or Princess Zelda's trophy, it'll increase those character's magic attacks.