In Hiun City / Castelia City (japanese/english version), there is a pier near the gate to the Sky Arrow Bridge. Talk to the scientist there, and answer Pansear to get a Fire Stone.
You can also get one in the Desert Resort.
There are also "invisible" Fire Stones in these places:
-Wellspring Cave
-Chargestone Cave
-Mistralton Cave
-Twist Mountain
-Challenger's Cave
-Victory Road
-Giant Chasm
in pokemon black and white
You'll need to use a Fire Stone on it.
You go to Castelia City and go to one of the piers (I forget which one, but I think it's the first one.) There will be an old man there and when you talk to him he will ask you to pick one of the monkeys in your party and if you pick Pansear he will give you a Fire stone. If you've already done that, you can give a fire stone to a Pokemon on a different game like Diamond and transfer it.
You get a chimchar
Minccino-shiny stone,muna-moon stone,pansear-fire stone,pansage-leafstone,panpour-waterstone,cottonee-sun stone,petlil-sun stone, electrik-thunder stone,lampent-dusk stone
Pansear uses a fire stone to evolve into Simisear.
You get the fire stone on the first dock of castelia city.
pansear the fire monkey pokemon
in pokemon black and white
In the Desert Resort
Vulpix, Growlithe, and Eevee.
You can buy them for P10,000 at Black City if you have enough people there.
Petilil will evolve with a sun stone, pansage with a leaf stone, panpour with a water stone, and pansear will evolve with a fire stone.
You can find it in the outside area or relic castle
Pansear evolves by Fire Stone into Simisear.
Pansear evolves With a fire stone
It evolves with a Fire Stone, not a certain level.