An easy tutorial to exiting out of games like SSB/MH4.
1º)Go to the Home Menu
2º)Open other app (e-Shop,AR Cards,Face Raiders) or Smash Bros/Monster Hunter 4 "Rebooter" by daxtsu( https://gbatemp.net/threads/release-smash-bros-monster-hunter-4-rebooter.379394/ ).
3º)Exit from the other app...