Migrating Problem

[dugtrio's diglet]

I just beat the elite 4 for the first time in Diamond! And then I saw all 150 pokemon. And then I upgraded from profesor oak to the National Dex. Then I went 2 pal park and it said something about me having to have six pokemon or sumthing... cant remember exactly wat it said thou... anyway I have more than six pokemon in both games (diamond and emerald)... wat do I do to fix the problem?

[XLucarioPowerX]

You have to have the six pokemon you want to migrate from Emerald in your PC(on Emerald). Than When you start up Diamond, instead of pressing "A" on "Continue" you select "Migrate From Emerald", and it will ask you which six pokemon you want to migrate to Diamond, but the pokemon can't know a HM move or it won't be able to migrate.