The only Pokemon from Black/White you can evolve with a moon stone is Munna to Musharna.
Otherwise, you can use a moonstone to evolve these Pokemon from previous generations while they are in Pokemon Black/White.
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Moonstone can be used to evolve: Nidorina and Nidorino into Nidoqueen and Nidoking, Clefairy can evolve into Clefable, Jigglypuff into Wigglytuff, Skitty into Delacatty, and Munna into Musarna
Pansear evolves With a fire stone
It evolves into Haxorus at level 48.
To evolve Pontya into Rapidash, in any Pokemon game, you must level it up to level 40.
Litwick evolves into Lampent at Lv. 41, then evolves into Chandelure with a Dusk Stone.