Originally Posted by Judge Dredd
any pokemon ? or just certain pokmeon from those games ?
After obtaining all three of the Genies new Therion formes, if you insert any one of the Gen 4 titles, one new Pokemon per title will open up. It will be the version mascots. They will all have their Hidden abilities (aka Dream World abilities). You will need no less than 3,000 Dream Orbs to be able to catch Landorus-Therion, which is the last of the three genies you will be able to get. (First, Tornadus, then Thundurus, then Landorus). After those.....
Diamond = Dialga (Telepathy)
Pearl = Palkia (Telepathy)
Platinum = Giratina (Telepathy)
Heart Gold = Ho-Oh (Regenerator)
Soul Silver = Lugia (Multiscale)
Sadly, I will probably never get the Dialga on my own. I never purchased a copy of Diamond. I can get the other four though.