you'll need a special cheat card.
Unfortunately there is not.
Travel around sinnoh
Steal Other Trainers Pokemon * 9223B5FA 00002101 * 1223B5FA 00002100 * D2000000 00000000
no
the Pokemon events are meant for trainers to get Darkria, Shaymin, and possibly Arceus but the informtion for that Pokemon hasn't been released yet
No trainers will have articuno.
Tyson have a Munchlax on Pokemon Pearl
Unfortunately there is not.
to get data on Pokemon in your pokedex, capture the Pokemon unless they are trainers Pokemon then you have to cheat to get trainers Pokemon.
Action Replay
Yes at the Hearthome gym leader's trainers.
Pokemon trainers don't know for sure.
No, but you can get Elekid from Poke'mon Firered.
No trainer have Rotom in Pokemon Pearl, Diamond, or Platinum.
yes
Ace Trainer At Route 210
In Jubilife city up from the trainers school