Pokémon can be cute, kind, quirky, & mighty, but not all are very smart. Some, especially Psychic Pokémon, are geniuses, like Mew, Uxie, and Chansey.

Only a small selection of species are listed for that increased spawn rate, according to Bulbapedia ... and without the Levitate ability, it loses one of its key strengths. Since it was introduced ...