you can migrate any you caught on ruby,
stop playing pokemon, i am the best don't play anymore(resettihater)
There is no griesous orb in Pokemon pearl. When you enter the union room with a Pokemon holding it while playing Pokemon platinum, it will go into your bag and you cannot give it back until you exit the room. You cannot get it in pearl sorry.
Once you have opened the Pal Park in Pokemon Platinum, you can migrate Pokemon from Emerald (or any other GBA Pokemon game) to Platinum. The Pokemon you migrate can not be migrated back and they can only be captured in the DS game via the Pal Park
Lunatone,Serviper,and i think Lotad im not sure on the last 1
Put a Pokemon Fire red while you're playing pearl or diamond then go to the valley windworks then you may find it there.
if you are talking about mawile, insert Pokemon ruby, turn on the game, and go to iron island. mawile is in the cave, but you may have to run around a while. good luck!
You must have Pokemon Emerald in the Game Boy Advance slot of the Nintendo DS while playing it and then it will be located at Route 211, and Lake Acuity.
You can release it while holding it in the p.c. box.
this is the same as Pokemon platinum, they are in the underground, they do take a while to find.
Grass will move, walk into grass but it will wear off after a while.
You can see Garchomp from Cynhtia while you facing with her in the Pokemon league
In Pokemon pearl they can be found on Route 226 and Route 230, they are not that common though so it might take a little while to find one, but they are there.