Mario (SSBU)/Up smash
Mario hops slighly and performs a headbutt from back to front. It has quick startup, good power and deceptive vertical range due to his jump. During the period the hitbox is active (4 frames), his head is intangible, making the attack somewhat disjointed. It also has quick interruptibility and moderate ending lag, making it very hard to punish.
The move disables jostling during frames 7-19.