|This needs some investigation.|
Discuss ideas and findings on the talk page.
($CD4-$D02?) When not in battle, hit A or C on the second controller to... warp? It appears that you cycle between five game states with each press, with A cycling forward and B cycling backward.
($1C3D6) Hold(press?) A+B+C on the second controller at the start of battle to automatically win the battle... and all future battles, as apparently the setting stays on (in the US version, at least)?
($CAC) Something appears to happen if you press B on controller 2 outside battle but I have no idea what...
Other places where controller 2 is accessed: $CC2 (does something with the start button), $1C474 (A button and D-pad)