A rumor has popped up about Dragon Quest IX possibly having a Wii connection where you could transfer monsters to the Wii from the DS.  No word on how this will be accomplished, but here’s the rumor post:

Japanese publication Game Labo has a bit of rumor for us to ponder. According to them, we will be able to take monsters from Dragon Quest IX on DS and transfer them to our Wii. They give absolutely no details as to why we would be doing this. I can’t see it relating to Dragon Quest Swords seeing that this game will be out before IX.

Take it for what you will.  We should learn more in mid May when Square Enix has their Party.

Source: Gonintendo