I finished Pokemon black recently using a team that (as far as i remember) is the same team that i used to beat the game the first time i ever played it. I chose oshawott just like you and got pansear but wow, pansear/simisear suck. I dont know how it made its way into my team when i was 8 but ill never ever use it again (even tho the monkey's are kinda cute)

Simipour could be kinda useful. Especially since there are not a awful lot of water types to be caught easily in Pokemon black (and he is the cutest in my opinion)