Shadow Dedede is supposedly a Mirror World counterpart of King Dedede. He first appeared, unexpectedly, in Kirby: Triple Deluxe as the penultimate boss of that game’s Extra Mode, Dedede Tour!, where he fought, and was defeated by, his Dream Land counterpart, at Royal Road. Immediately after Dedede defeats Queen Sectonia DX, the Dimension Mirror appears and Shadow Dedede emerges. He attacks Dedede without warning, though he is defeated and shatters into pieces of glass.