Players can change avatar's gender and outfit whenever they want now. The avatar customization became available due to the recent update. Tap the link below to see how to change your avatar's outfit.
How to change your avatar's outfit of Pokemon Go
How to change your avatar's outfit of Pokemon Go | PokemonGo
List of avatar customization options [Female] | PokemonGo
Charmander nests and spawn locations
Machop
Grimer