yes
Regies:use the Pokemon modifier cheat witch you can find on this site
you cant get it without migrating.
No.
you cant
get cheats on a actionreplay.
no
you can get a plusle in diamond by migrating it from like emerald or something like that
Do not have your sapphire in your DS when you play Diamond
Cheating, hacking, or trading.
No.
You can get Poochyena into your Pokemon Diamond by migrating it from a Sapphire, Ruby, or Emerald Pokemon game.
YOU CAN'T GET CELEBI IN DIAMOND WITOUT MIGRATING
No. Migrating is when u put a GBA Pokemon game in the GBA slot and get it in diamond thru the pal park. Trading u get a Pokemon from another trainer.