after entering the code go to whatever trainer you want to battle and try to catch there Pokemon
No it isn't possible through normal gameplay in any game of the series unless you count the Snag Machine in Pokemon XD and Colluseum.
u cant . its impossible
You can't, you only can in Pokemon XD:Gale of Darkness that is for GC but can be played on Wii. You can just use a Ultra, Master, anything and you will snag it.
go to www.hogtied.com for cheats go to www.hogtied.com for cheats