is special form of Little Mac
originating from Punch-Out!!
for the Wii
as a feature in the multiplayer mode. In Super Smash Bros. For Wii U / Nintendo 3DS
, it appears as Little Mac's Final Smash
Super Smash Bros. for Wii U and 3DS
Giga Mac is Little Mac's Final Smash. When Little Mac is in Giga Mac form his attack and knockback is increased.