What would (You) think if GameFreak added rare, niche types that only a few Pokémon had? Like how the Dragon type used to be before it was casualized. Pokémon types that you would only rarely come by, but who would also be unique and special so it feels rewarding to find a Pokémon of this rare type.

Examples hereof could be an actual Null type or a Mushroom Type.

http://www.strawpoll.me/11307816