11. The Inferno Lord, Fire Leo (Viewtiful Joe)
https://www.youtube.com/watch?v=Ca02qnQ44rA The Viewtiful Joe series was certainly one of the most unique new franchises to be released during the heyday of the GameCube back in 2003, and its colorful boss battles were certainly part of its cinematic charm. It took place in a candy-coated, brightly lit world that also sparked fights against some quirky villains with names like Gran Bruce and Hulk Davidson. But there was no boss battle in Viewtiful Joe that was anywhere near as entertaining as the one you had with a fire-breathing beast named Leo, the Fire Lord. This tank of a creature took you to the limit, challenging your skills inside Joe's skin in ways that no other boss in the game did. All your dexterity and focus had to be used at its peak here, as the game asked you to fight with all your ability in order to win and the reward of even more madness to come.