Imran: Yes Snorlax can learn giga impact. When I caught the Snorlax Lvl50 that was sleeping in front of Digletts Cave it knew Giga Impact in Pokemon Heartgold and Soul Silver. I do not know about other pokemon games in which you can catch Snorlax that they would know Giga Impact or not. But of course you can teach Snorlax Giga Impact with a TM. So, yes Snorlax can learn Giga Impact.
Giga impact
You can't, giga impact is a Gen 4 move.
Almost All Pokemons In The 3rd Or 2nd Forms Can Learn Giga Impact so Can Dragonite
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Imran: Yes Snorlax can learn giga impact. When I caught the Snorlax Lvl50 that was sleeping in front of Digletts Cave it knew Giga Impact in Pokemon Heartgold and Soul Silver. I do not know about other pokemon games in which you can catch Snorlax that they would know Giga Impact or not. But of course you can teach Snorlax Giga Impact with a TM. So, yes Snorlax can learn Giga Impact.
Garchomp cannot learn Giga Impact from leveling up in Pokemon Platinum. Garchomp can learn Giga Impact from the TM that teaches it which is TM68.
Every fully evolved Pokemon can learn Giga Impact. Fully evolved means that it cannot evolve any further.
I think only garchomp can learn it but its a dumb move Electivire can also learn it
Yes it does. In order for it to learn Giga Impact you must have TM68
Giga impact
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You can't, giga impact is a Gen 4 move.
Stoutland learns Giga Impact at level 59.
Almost All Pokemons In The 3rd Or 2nd Forms Can Learn Giga Impact so Can Dragonite
obtain on the pokewalker or cleadon game corner prize [15,000] coins
In Pokemon Beautifly learns the move silver wind at level 34. This Pokemon learns giga drain when it reaches level 38.