Rosie is a talented artist. She once painted a portrait of her sweetheart as a gift.

[Rosie gives paper!Charmander high heels and a purse. She'd add make-up and long hair, but considering her trainer...]

Try to find ones that cover your team's weaknesses. For example, if you teach Watts a Grass- or Electric-type attack, he'll be able to defend himself against Water-types.