How do you find the TM Giga Impact on Pokemon Diamond?

Question

Giga Impct is a TM that garchomp charizard etc can learn.

Answer 1

You need to buy it at the coin exchange in velstone city for 20000 coins.

Comments

but i don't know where the coin case is

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its alright i've fand it by the way thanks

Answer 2

You have to buy it at the veilstone shopping department, fpr 20,000 coins I think

Comments

It is 20,000 coins. I know cause it took me a while to finally teach it to my Dialga.