no it does not evolve
No.
to evolve pansear you need to give it a fire stone
Pansear evolves by Fire Stone into Simisear.
To gain a Simisear on Pokemon Black/White, you need a Pansear first. If you chose Oshawott, you can get a Pansear from somebody in the Dreamyard. To evolve it to a Simisear, however, you need to use a Fire Stone, which can be given to you by a scientist in Castelia City.
The Pokémon that evolve from a Fire Stone's use would include Simisear, Arcanine, Ninetales and Flareon.
Vulpix into Ninetales. Growlithe into Arcanine. Eevee into Flareon. Pansear into Simisear.
Vulpix into Ninetales. Growlithe into Arcanine. Eevee into Flareon. Pansear into Simisear.
Eevee into Flareon Vulpix into Ninetales Growlite into Arcanine Pansear into Simisear
Pansear uses a fire stone to evolve into Simisear.
Vulpix to Ninetails Growlithe to Arcanine Eevee to Flareon Pansear to Simisear
Simisear, being evolved with a stone, does not learn any new moves on its own. Just like raichu and similar pokemon, once you evolve pansear with the firestone, it will no longer learn any moves on its own. It is best to wait before you evolve your pansear, so it can learn better moves, and THEN evolve it. If it's already evolved, you need to use TMs and HMs to teach it better moves.
Vulpix into Ninetales.Growlithe into Arcanine.Eevee into Flareon.Pansear into Simisear.Vulpix into Ninetales.Growlithe into Arcanine.Eevee into Flareon.Pansear into Simisear.