I'm training a Stoutland in black 1 and it wants to learn Giga Impact. Should I teach him it?
In-game it probably wouldnt be a bad move to have as long as you have another reliable move, so Yes if this is in-game. If it is a competetive team, no.
Depends on your Moveset
I would go with NO.
Because there are two other great Normal type STAB's that Stoutland learns:
The thing I hate about Giga Impact is that it has that annoying recharge.
150 BP may look tasty, but the Damage taken in the next turn may be a possible KO or near.