The gameplay of Diamond and Pearl are much the same as previous PokÃ mon games .
Though Diamond and Pearl were expected to be released in Japan by 2005 , Nintendo revealed that the developers were still working on aspects of the gameplay and that the games would not be released until 2006 . The company said that Diamond and Pearl would be able to communicate with PokÃ mon games for the Game Boy Advance , allowing players to transfer their PokÃ mon to the new games .