If Shedinja used a Physical move on a Yamask or Cofagrigus, would it be affected by Mummy?
>Multitype, Wonder Guard and Mummy itself are the only Abilities not affected by Mummy.
Source: Bulbapedia/ Mummy
Nothing would happen.
After taking damage from a Direct Attack, changes the attacker's Ability to Mummy. (Does not affect Wonder Guard or Multitype.)
Source by marriland.com