http://www.gamesarefun.com/news.php?newsid=4098
Igarashi also revealed some very intriguing multiplayer and community possibilities:
"...I'm hoping to find space for a versus mode if time allows." (speaking about wireless multiplayer)
Perhaps the most exciting revelation for Castlevania fans is Igarashi's promise of Enemy Soul trading and the exchange of customised maps, by way of the DS's wireless capabilities. This implies that players will be able to create their own maps, which is a neat feature never seen in Castlevania games.
Nice