Tiny Toon Adventures

Tiny Toon Adventures
Developer: Konami Publisher: Konami Platform: NES Released in JP: December 20, 1991 Released in US: December 1991 Released in EU: October 22, 1992 This game has hidden development-related text. This game has a hidden level select. This game has anti-piracy features.

Tiny Toon Adventures is a NES game by Konami, based on the 1990s cartoon.

Stage Select and Player No Damage

All versions of the game (including the Japanese version) feature a simple stage select cheat. To access it, at the title screen, press A, A, A, B, B, B, Select, Select, Select, A, Start. Choose a level by pressing Up or Down, then press Start.

However, the Japanese version features two stage select cheats; the second one is Up, Right, Down, Left, Up, Right, Down, Left, B, A, Select, Select, Select, Start and it has an additional "Player No Damage" option, which can be toggled by pressing Select.

Although the US and European versions normally have this option disabled, you can enable it by using the Game Genie code OESGKTPA for the US version, or OAXKVYPA for the European version.

Build Dates

An ID string listing the build version and date can be found at the end of the PRG ROM:

MAST910809

MAST means it's the "master" version, and the numbers represent the date. As a result, we can tell that this build was compiled on August 9, 1991.

Anti-Piracy

As with most games Konami published in the '90s, this game features a copy-protection routine. At the start of the game, the partial CHR ROM checksum is calculated to ensure its consistency (for CHR banks $38-$3B, sum total of four 256-byte blocks at $0000, $0500, $0B80, and $0D00, which contain the graphics for Konami logo and fonts for the copyright string), and a flag is clear if there's a consistency failure.

If the flag is clear, completing the final level will cause the game to loop back to the first level instead of playing the ending sequence. However, if the flag is still set at the time of the final check (CHR test has passed or skipped), there is an additional summing of the first protection routine code in the PRG ROM. If this test is passed as well, then program will continue its normal operation or else do a loop back to the first level as well.