PokÃ mon Black and White are Role-playing games where the player captures creatures called PokÃ mon and battles them against other PokÃ mon. . On May 28 , 2010 , both the official Japanese and English PokÃ mon websites revealed names and designs of the two major Legendary PokÃ mon of these games , who also serve as the game version mascots : the White Yang PokÃ mon Reshiram for PokÃ mon Black and the Black Yin PokÃ mon Zekrom for PokÃ mon White .