4th Gen EXPLOSION??

[Sethon]

I'm trying to get my Metagross to learn explosion, but WHERE DO YOU FIND IT???!! He doesn't learn it naturally and he certainly wont learn it through the move tutors...

HELP

 

[Azonic]

Explosion is a TM in Diamond and Pearl. TM64 - Explosion. You obtain TM64 in the Slot Games of Veilstone City.

 

[The Graceful Assassin]

explosion is tm 64 i believe you must import it from another game to get the tm or possibly get it at the game corner. ( not to sure on that)

I know another way but that is for emerald a guy teaches it in Pacifidlog town.

EDIT: someone beat me to it

 

[Johnnyboi]

You've gotta pass 10 straight bonus rounds at the Game Corner to get it. Google "veilstone game corner guide" or something like that.
If you don't consider yourself a player with fast reactions, you probably won't make it. You have to do it fast. I got 20 bonus rounds myself.