Epica

Epica was named by Galloway1934 after the Dutch power metal band of the same name.

Gender
Epica is a trans man. As a pikachu, he wore a beanie (touque) over the tip of his tail to cover up the heart that female pikachu's are born with. As a Raichu that was no longer needed so he opted to instead wear it on his head.

The idea of Epica being transgender came from a comment that Sky made while drawing Epica in his hoodie that this was his "dysphoria hoodie". This was interpreted further by members of the chat to mean that Epica was trans which everyone took to excitedly and expanded upon.

Battle
Epica was one of the 6 pokemon that fought in the Elite 4 and took out both Wallace's Tentacruel and Gyarados.