The bar will appear right above the character’s icon during battles. When it gets full, the “standard special move” will be altered to a one-hit killing uppercut punch, according to Masahiro Sakurai. You can find some screens of the attack, along with other shots from “Super Smash Bros. 4” for Wii U and 3DS, in the slideshow to the left of the article. You can find the full statement from the game director in regards to the power meter below:
His biggest feature is his Power Meter. When this gets charged up, his standard special move changes! It turns into a one-hit-K.O. uppercut.
Masahiro Sakurai did not reveal how exactly the bar will be filled up. Little Mac could potentially increase the power meter by landing attacks. Alternatively, it could also build based on the damage taken by the boxer.
Little Mac, who previously appeared as an assist trophy in “Super Smash Bros. Brawl,” should diversify the roster of “Super Smash Bros. 4” for Wii U and 3DS. Along with his on-hit kill move, he also specializes in fast melee punches.
With the addition of Little Mac, the playable roster for the upcoming title has been expanded to 23. The software product is expected to ship for the Wii U and 3DS before the end of the year.