Inventory glitch

SELECT..... SELECT x2 > flick ANALOG

Pass through death barriers, stall cutscenes

Level looping

Inventory glitch > hold CIRCLE + DIRECTION > close invent to begin moving

Fall from the sky to whatever position you desire, provided you can find a setup to make your way there

Info about level looping

Once falling you can switch to DPAD for more precision

It's possible to get a fast loop, that takes half the time of a regular loop. This happens when you hit the bottom of the level in certain ways/places (for example in Haunted Ruins you can hit the demon room door trigger mid-loop).

Knockback dash

Wield club > hold DIRECTION into wall > Press SQUARE and exactly 2 frames later press OPPOSITE DIRECTION + TRIANGLE + CIRCLE all at the same time

Big movement speed increase. Necessary for dragon gate skip (DGS) in The Gallows Gauntlet

Info about knockback dash

Practice getting knockbacks on walls first:
In The Gallows Gauntlet go immediately LEFT at the start
ANALOG
Hold LEFT into wall, put a finger on SQUARE, TRIANGLE, CIRCLE
Press SQUARE and exactly 2 frames later press opposite direction (RIGHT) + TRIANGLE + CIRCLE all at the same time
If done correctly you will hit the right wall

Speedglitch

Flick ANALOG repeatedly with a specific rhythm

Move faster. Used until you get the dash