Board Thread:Questions and Answers/@comment-36657572-20180824045103/@comment-36671944-20190101090848

Most likely as mettaton does not disintegrate when killed,instead will remain on the overworld screen as a dismantled mettaton EX (if spared) or an obliterated mettaton (if killed.)

However,for the glad dummy,he disintegrates.This is odd as he poses as some "ghost possessed threatening dummy" when known as "mad dummy."

Now I may be wrong on both sides,but I will explain that later.