Day 21 - A Pokemon that shouldn’t be able to be a female.
Pikachu, because in my mind there is only one, and he is a boy!
Most of my answers are from the first gen. because that is the most recent one I played. hah However, I’d say Tauros. I tried for hours and never caught him so I just ended up doing the Cinnabar Island cheat to get him and Kangaskhan!