Speedflip

A speedflip is a glitch that allows the player to gain an arbitrary amount of speed. In the direction perpendicular to a sideflip, Mario's speed is not capped, meaning one can, under the right conditions, build up infinite speed in this direction. Mario's acceleration in this direction is proportional to the component of the left joystick pointing in that direction, with a maximum acceleration of 0.075 units/frame².

Mario's speed in the direction of the sideflip and his speed perpendicular to the sideflip are completely independent. This makes it possible to vector a speedflip, squeezing out just slightly more speed (though the acceleration is unaffected).

Pedro spots

A Pedro spot is a location in which Mario can build up speed with a speedflip while staying still. For a location to work as a Pedro spot, it must have a way for Mario to maintain his vertical position, next to a wall. For example, in a spot with a wall parallel to and very close to a slope that's too steep for Mario to stand on, the wall will push Mario into the slope, and the slope will push Mario back into the wall, but maintaining his vertical position rather than falling. The whirlwinds in Snow Kingdom can also work as Pedro spots. The name "Pedro spot" was borrowed from a similar glitch in Super Mario 64.

Location	Description	Clip
Between the rolling corn and a wall in Luncheon Kingdom	If the corn is moved slightly away from the wall, it'll allow Mario to get stuck between them. Once Mario has around 120 speed, he will move up the perpendicular wall, as it has a very steep slope near the bottom. Mario will escape this spot at around 1200 speed.	Clip
A whirlwind near Luigi in Snow Kingdom	This spot is unstable, making it difficult (but not impossible) to build up significant speed. Because of its instability, it's possible to be pushed up onto the adjoining slope with a high horizontal speed, thus converting it to vertical speed.	Clip
The second highest whirlwind in Snowy Mountain	It seems that Mario won't escape this spot and can build up speed indefinitely.	Clip

Uses

Speedflips currently have little use, but some proposed applications include finding a new infinite fall, and, combined with nut sliding, a new way to collect the Third Courtyard Outskirts moon in Bowser's Kingdom without capturing anything. A speedflip has also been used to jump from the painting island in Bowser's Kingdom to the Third Courtyard Rear island.