Players can select avatar's gender and clothes anytime. The outfit customization was introduced in Pokemon Go due to the recent update. Tap the link below to the details of avatar customization.
How to change your avatar's outfit of Pokemon Go | PokemonGo
List of avatar customization options [Male] | PokemonGo
Best Pokemon for fighting against Exeggutor
Machop nests and spawn locations
Machop
Kabuto nests and spawn locations
Suicune stats & moveset