Um cause the typing is cool? (Comment)

They must have evolved to hunt a particular species or protect themselves from a predator. (Comment)

Clearly it is because of something they have eaten over many generations. (Comment)

They always looked a little electrical to begin with, cause their so alien like with those glowy parts on their body. (Comment)

I'm surprised they aren't Electric-type and Water-type. (Comment)

They are just retyped for the dex to have a filler spot. (Comment)