Game Genie code 0F1-81F-F76 or Gameshark code 010F70C3 will start the game in a fairly sophisticated TOSE debug menu offering a sound test and even an MBC7 test!
Test various events and warp to any point in the game.
SPECIAL 2 EFFECT
Tests all the special effect animations in the game.
Displays all the Heroes and their statistics.
Edits various in-game flags.
Edits various flags for battles.
Shows all special cutscenes in the game.
Tests all the music and sounds in the game. A sound visualisation is represented in decimal on the upper-left corner.
Tests all characters special attacks in the game. You cannot return to the main debug menu.
Probably the most interesting feature of the debug menu is having the ability to test the integrity of the game's MBC7 chip.