You can do that? OMG. *screams* I'm coming Kyogre!!
Ahem. Here's what my first 6 will be:
1. Kyogre! (lv.100)
2. Rayquaza (lv.75)
3. Groundon (lv. 50)
4. Volebat (lv. 30)
5. Illmuse (lv. 20)
6. Anorith (lv. 30)
To clarify, the method is Pal Parking, where you migrate 6 Pokémon from a GBA game into the Pal Park, a place where you go into a little catching mini-game to recatch all 6 of them. The 6 you choose are ones already caught in the GBA game, and they keep the stats, trainer info, items, etc. Migrating can only be done once every 24 hours per GBA game, but there are ways to bypass that it seems.
As far as catching the migrated Pokémon, you don't actually battle them, but rather, just encounter them and throw a Park Ball that is guaranteed to catch it. Therefore, the only challenge comes in the act of finding the 6 Pokémon in the certain areas a specific Pokémon would reside.
And as far as what I migrated:
Marowak
Starmie
Charizard
Eevee
Dratini
and something else I forgot...
The Charizard is my loyal friend who I fly around on, the Starmie I actually use sometimes, the Marowak I ended up using to breed and make a new one, the Eevee is sitting around, and the Dratini is my favorite little Dragonite. ^^
The legendaries I actually only recently migrated over, as I was waiting for me to actually catch the Suicune in my LeafGreen before I sent over the birds and Mewtwo.
wtf is a volebat?
a typo perhaps?
Probably meant Volbeat, the male counterpart to Illumise. ^^; Or was that sarcasm? It's 5:22AM here, too late/early for me to tell.