Kirby & The Amazing Mirror 100% Playthrough: Part 7 (RR West, All of Carrot Castle)
Carrot Castle is southwest of the main Rainbow Resort hub, located deep within a coniferous forest. This entire Part focuses on me completing Carrot Castle. Notice how it may reuse Moonlight Mansion's main background, and its theme is of that Area, as well.
I have to backtrack to the main hub a couple times in order to cover more sections of the place that I couldn't get to before. Sometimes I hate one-way doors.
After a while, Kirby eventually reaches Carrot Castle's boss: Mega Titan. Its armor makes it invincible to any non-Spark, non-Beam attack. Since he's weak to electricity, knock him back to the electric walls that surround the arena. Convenience? You tell me!
Eventually MT explodes, but then has a second, much-weaker form that only involves his head. It's weak enough for a fiery Hammer swing to 0-Death it.
Too bad the startup fire got in the way, but that doesn't change the fact that Hammer Kirby's Up+B is the most powerful attack in the whole game. He could kill almost everything in the game in one or two hits.