Mega Titan

Mega Titan is a boss in Kirby & the Amazing Mirror. He was the boss of Carrot Castle and he was fought in a certain way. There were 2 electrical walls lining the sides of the arena. Unless the player had Spark, Beam, or UFO, they would have to hit him into the walls. After phase one, you fight the Titan Head, which can be affected by copy abilities alone now.

Trivia
Interestingly, Mega Titan is the only boss of any Kirby game that had 2 phases in the same arena. He was also the only one that had a way like this to defeat him.

Some players joke that the Titan Head is really Dark Meta Knight without armor.