By IronMaskedMarauder
#206929 Image
"Any Pokémon captured with a Dark Ball will become evil and their power will increase to the highest level."

My suggested feature is to add the Dark Ball and Dark Pokémon. When a Pokémon is caught with the Dark Ball, its friendship will drop to 0 permanently and its level will increase to 100.

Pokémon caught with the Dark Ball have a darker coloration.