NSMB2 mod that makes every level open enough for a Mega Mushroom rampage, plus some edits to tileset behavior for more destructibles. Filesystem sorted to line up with AppData\Roaming\Citra\. If it matters, based off the original US release of the game, not the deluxe version.
*After defeating a castle boss, press L+Down to disable Mega Mushroom before the level ends! If not, the game will freeze!
Progress: Complete up to World 2.
Intended for use with the following cheats at minimum:
Infinite Mega Mushroom
L+Up Mega, L+Down Super Alt.
You must press L+Up every time you enter a level or change areas. Sometimes you will need to press L+Down to enter a door or pipe. After defeating a castle boss, press L+Down before the level ends! If not, the game will freeze!
The boss for 1-Tower crashed with the 'shroom, so it was replaced with a bunch of enemies and a flag pole. World 2's Reznor battle worked, though... Memory peak, maybe? For World 1?