the jellyfish council

Mentors in Deltarune are either a dead old man or an anime twink trying to fuck your dad

Alternatively:

Super Mario 64 DS contains a glitch known as "hyperspeed holding". If the player character is holding an object in his hands and continuously runs on a slope of a certain incline against a wall, the character will build up speed indefinitely (or at least until he clips through the wall due to the speed being too high).

In the footage, this is used to obtain a Red Coin from within an ice block without using Yoshi's fire breathing ability which would normally be required to access it. Wario is holding the baby penguin and running against a fence on the slide. After a minute of this he reaches such speed that he can run all the way up to the ice block and clip inside it, collecting the coin.