The Straight Lunge is Little Mac's standard special move in Super Smash Bros. for Nintendo 3DS / Wii U and Super Smash Bros. Ultimate. Upon using the move, Little Mac rears his right arm back and then throws a dashing cross punch; during that time, he gains knockback resistance against weaker attacks. By pressing the button again, Little Mac charges forward and hits any opponents in his path with a straight punch. The more it is charged, the farther he travels, but the attack's power does not increase unless it's fully charged. A fully charged Straight Lunge causes Little Mac to cool down for a longer period, but it also delivers a good amount of damage and knockback upon landing on an opponent. Whenever Giga Mac uses Straight Lunge, it charges to full power at a much faster rate than normal. In Super Smash Bros. Ultimate, Straight Lunge is among a number of chargeable moves that are of being canceled when not fully charged, which makes it safer and more useful for mindgames.
If used in the air, Straight Lunge does not offer any horizontal movement, unless it is fully charged. Additionally, its attack power is considerably weaker in the air.
When Little Mac's Power Meter is full, the Straight Lunge is replaced with a one-use move, called the KO Uppercut; Little Mac delivers an unblockable uppercut in front of himself. Contrary to its name, however, the KO Uppercut isn't a one-hit KO move, as it cannot normally KO fighters at 0% damage, but whenever the attack hits any opponents, they are sent flying a great distance. The aerial version of the attack is much weaker in power. Also, this move's ending lag is long, which can leave Little Mac vulnerable to counterattacks if the attack misses. In Super Smash Bros. Ultimate, Little Mac performs a jump with the KO Uppercut.
In Super Smash Bros. for Nintendo 3DS and Super Smash Bros. for Wii U, the two variations for this move are Flaming Straight Lunge and Stunning Straight Lunge. Flaming Straight Lunge deals fire damage, charges more quickly, and can hit multiple times, but deals less damage. Stunning Straight Lunge stuns opponents when fully charged, and travels a farther distance, but it doesn't offer any knockback resistance while charging.
The Straight Lunge is the move Kirby copies after Inhaling Little Mac, although he cannot use the KO Uppercut as he does not gain a Power Meter.
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