[Gameplay] Teleport through Rock in Mt. Bloom with Blink.

[Zekke]

This is a more major of a glitch than the other one. You can use blink to teleport past Rock in Mt. Bloom and skip to the gas-filled tunnels before the quest. Note, collecting the quest item before you are actually on the quest will leave you permanently stuck on the quest unless you reset Mt. Bloom with commands.

Spoiler

Note how I'm in this room before actually having the quest that lets me go here.

 

[Zekke]

If you are actually on the quest (Rock is replaced with Steve once you begin the quest). You cannot teleport through Steve, meaning you have to still go get the Shroomie to scare him off. Sorry speedrunners.