Not Cancer

Playing Mainstream Games
Playing non mobile-esque side games (Mystery Dungeon, Snap, Coliseum)
Playing the physical card game
Completing your pokedex
Battling with people you know in real life
Enjoying it as a game
Playing hacks
Nuzlocking

Cancer

Sexualizing Pokemon
Competitive Battling
Liking the anime at all
Gen warriors
Touhou hacks
Digital version of the card game
Mobile type Pokemon games
Caring about the storyline or lore
Owning plushies that you bought as an adult or openly flaunting Pokemon clothes or plushies or shit