Ever wonder who you should use your Giga Impact TM on? Hands down, the best option is Slaking.
1) high attack
2) STAB (same type attack bonus)
3) (the main reason) He only attacks every other turn anyway, the recharge tunr wont affect him! :D
and when i said high attack, i meant not only the power of giga impact, but slaking's attack
To catch pokemon easier, press and hold down the A and Down Buttons, this does not work all the time