Hmm, actually, Ground would work instead of Grass aswell, but that wouldn't fit as Rock and Ground are very similar.
@psyburn When Desukaan is hit by a physical move, the user of that attack would change its ability to Mummy. So let's say that an Arceus attacks Desukaan, it would lose its Multitype ability and have Mummy instead (no more plates for spacegoat D: ) And I'm guessing if one of your Pokemon (if in a double/triple battle) attack Mummy Arceus it will also change its ablility and so on.
Like Rough Skin, when it is hit by a physical attack, the opponent's ability is changed to Mummy. That's pretty freaky stuff. I really like the mummy's design, making it look really sinister.What does "Mummy" do anyway?
I bet that it will evolve into a minotaur.That's freaky-looking, and it better not be Tauros's evolution.