>>50047242I would choose a (jolly, naturally) Sneasel as a partner, and since we’re partners I would let her be the one to decide when she evolves into a Weavile, which I assume she would want to grow up one day. The Pokédex entries are always talking about their advanced brain development and such so when she did become a Weavile I would pretty much treat her like a tiny human and as my best friend.
I would let her run free out of her Pokéball, as I would assume Sneasel and Weavile have a lot of energy and don’t like staying cooped up for too long.