[Hey, he doesn't like it either, but you know what he likes even less?

Admitting that he's a big fat lying liar, and making Alphys look bad in front of King Fluffybuns, especially when she's not even here. Haha...ha...]

Certainly not! The genuine article can never be mistaken for anyone else, nor substituted! Though I suppose a few cosmetic changes could raise the shock factor! Mettaton: A human?! GASP!!

[He actually said gasp.]