Over world commands:
B + ->   Changes current power-up
B+Up  Copies current power-up to inventory slot
B + Down Changes current Yoshi
B + <-  Toggles the switch palace blocks of the current color of Yoshi you are riding.  If you are not riding Yoshi it will turn all switch blocks off.  If all switch blocks are already off it will turn all switch blocks on.

In Level Commands:
L+Select resets current screen
L+Select+Start resets level (this doesn't work perfectly and you're usually better off exiting and reentering)

Things to note:
-You must create your own save file. I would recommend a 92 Exit File with the switch palaces undone so you can practice them if you need to.  
-You may hit "Back" on any level even if you have not completed it.
-The effects of getting all 96 exit goals (pallet changes and stuff) are suppressed
-If you enter a switch palace after toggling that colored block as active the switch will not appear.
-There are a couple levels that are glitched and will not you reset them (DS2 and CI2 come to mind)  Simply exit the level and reenter them.

Practice Rom

Super Mario Advance 2: Super Mario World 11 exit

Flameberger

Smartball

Smokeyirish

Super Mario Advance 2: Super Mario World

Game Boy Advance

Game Boy Interface

Switch Virtual Console

Vhaeraun

LaviChan

Villan5546

USA / NTSC

EUR / PAL

JPN / NTSC

Mario

Luigi

Brother*

Nintendo DS

Wii U Virtual Console

Game Boy Player

Switch 2

Super Mario

SMA2 Speedrunning discord

Switch 2.

SMA2 is coming to the Nintendo Switch

why video should be required

Will my runs be validated?

is gbaHD run legal?

rezephae

Umari0

Sten

Mingura666

MethodOrMadness

Anir