Instructions
Hold down the "A," "B," "Select" and "Start" buttons to execute a soft reset on the Game Boy Advance. You must hold down all four buttons simultaneously for the soft reset to work.
Check the game manual to see if a different soft reset option is available. Some games use a different combination of buttons for the soft reset. For example, the game "Pinobee" requires you to hold down the "L" and "R" buttons in addition to the normal soft reset combination.
Hold down the "Start," "Select" and "B" button to execute a hard reset when no soft reset option is available. Some games, such as "GT Advance," do not have the option for a soft reset. A hard reset can also be executed by turning off the system, waiting a few seconds and then turning it back on.