Shadow Dedede

Shadow Dedede is a boss appearing in Kirby: Triple Deluxe. He is the Mirror-world version of King Dedede, although his relationships with the original, or any mirror-world entity, are unknown. His only appearances are in the extra game (where King Dedede faces him after making his way through Floralia to Royal Road, freeing the Floralians (including their leaders), and beats Queen Sectonia EX) and the true arena. His battle is basically a harder version of Masked Dedede from story mode. He can also make a mouth form on his belly to fire energy blobs. Upon his defeat, Shadow Dedede vanishes in a burst of... glass? His battle theme is the Masked Dedede theme from Kirby Super Star Ultra (a version of the original that is 75% faster).