You know, I'm actually going to guess that's the keaton mask from Zelda and not a Pikachu mask. Even if it references Pikachu, it technically isn't. However, between stingy rules of post what you see and all the technicalities in that VS. being lenient and just going with it because it's such a minor detail I will remove the pikachu tag but if anyone thinks it really belongs there I'm not here to mess anything up so I'll leave that for debate.