>>27107289A mega evo has improved stats and is a more capable pokémon in battle in general terms (not considering specific strategies). Unowns, Vivillions and other pokémon with many formd just change visuals or swap stats, but are essentially the same.
Would you include all cosplayer Pikachus and surfing and flying Pikachu and the spiky ear Pichu? And all shinnies aswell?
The pic can't be infinitely large
