Battle Stadium: Senbatsu Pro Yakyuu

Battle Stadium: Senbatsu Pro Yakyuu
Developer: IGS Publisher: IGS Platform: NES Released in JP: December 19, 1990 This game has debugging material. This game has a hidden sound test.

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Debug Menu

At the main menu, select and enter the "おやすみ" ("Oyasumi" or "Good night") option. Instead of powering down the console, enter Up, Up, Down, Down, Right, Left, Right, Left, A, B, Start (a slightly modified version of the Konami Code).

Menu item	Effect
OPENING	Does nothing
ENDING	Jump to the game ending
キャラジェネ	CHR test
MAPをみる	MAP view
サウンドテスト	Sound Effects test
BGMテスト	Music test
がめんひょうじ	Screen Display, displays all game screens, number of the current screen indicated in the middle of the top of the screen

Game Genie code PGONLLPK + EYONGLEI re-enables more hidden options in the debug menu as well as a simple Debug Mode access cheat. To get to the Debug Menu, just hold A then press Reset. Previously unused options in the Debug Menu now can be used. Need investigating in what exactly they do. Some of them are writing some signatures to the SRAM, some toggles unknown flags, seems unused for now. The game is checking if the program is in full debug mode or not by checking the SRAM signature. In release version it is "IGS", but for debug version it should be "ALF". This Game Genie code just fools the game into thinking it's the debug signature check.