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The DemoDemo disc contains a pre-final Motor Toon Grand Prix 2 build that hides most content behind menu and timer limits, but the game data for all characters, most modes, and an extra course is actually present.
A small patch flips menu status bytes and removes the five‑minute demo timer, unlocking Single Race, Time Attack, Two‑Player Battle, seven extra characters, and the extra Toon Island II course so you can explore the prototype.
The prototype differs from the final release in visible ways — different title screen, HUD layout, character names, lighting, handling, zoom levels, and messages — and it’s notable because one of the team members later went on to create Gran Turismo.

Both the Saturn and PlayStation releases have a title-screen cheat code that unlocks a Course Select so you can start from later stages; the Saturn sequence requires very fast input (15-frame timeout).
On the Course Select screen, holding specific button combinations with Start selects stages 4–7 and gives weapons appropriate to the chosen course (different hold combos are used on Saturn vs. PlayStation).
The codes were found by tracing the game's input handling in memory with tools like Cheat Engine and the Mednafen debugger; the game matches a timed button sequence to set a cheat flag and then reads held-button flags to alter the starting course, and the logic is the same on both versions.

The Destruction Derby preview on the PlayStation Picks disc is rendered in real time and the disc actually contains both a non-interactive auto demo and an interactive "One Level Demo" using the same car and stage.
A single memory flag at 0x800cd604 controls which demo runs, and changing that flag or patching the demo-selection function at 0x8004030c enables the playable demo, which is time-limited to 60 seconds and has small visual and gameplay differences from the final game.
A patch that forces the playable demo to load is available on GitHub, and the demo comes from a July 23 build that predates known prototypes and reveals early-stage differences from the released version.

The Last Bronx Flash Saturn disc demo is a real-time auto-demo that runs the game engine but ignores controller input, and a patch can re-enable player control so you can actually play the preview build.
The hack works by changing a few memory bytes to flip CPU/player flags, altering the match state so it advances instead of showing Game Over, and skipping a problematic function call (NOP) that would otherwise freeze the demo.
This demo is an earlier build with missing or placeholder content: several stages or objects are absent or reused, some character models and colors are incomplete, and menus like mode select and staff credits are not present.

The game includes a Bonus Mode unlocked by the SBOM Joycard on the Options screen, which lets you view the game’s movies, images, and sound clips for each section. That hardware check can be patched to always enable Bonus Mode so you don’t need the special controller.
There’s also a hidden graphical debug menu that lets you jump to cutscenes, pick courses, play music, and load battles. It’s not reachable in normal play but can be unlocked by changing a memory check to the required value.
Community patches make both Bonus Mode and Debug Mode easy to access without special hardware or deep hacking by replacing those runtime checks with static values. Those patches and instructions are publicly available so players can try the menus themselves.

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