Sonic the Fighters is getting better support in MAME soon. Left is the old MAME build, right is the new MAME build. The biggest difference here is the layering of the shadows.

Here is Knuckles fighting upside-down in the air, alone, for your enjoyment...

Sonic the Fighters disables gravity for many moves and actions, contrary to my previous post. Here's what the game looks like with gravity ALWAYS applied to everything.

Sonic the Fighters has a routine which seemingly isn't used very much that disables gravity. Here's the routine in action when it replaces the "normal gravity" routine.

Sonic the Fighters has function which will freeze the game and display all the Intel i960 CPU's registers and their values as well as where the freeze occurred. The game will only freeze when certain conditions are met. Currently it seems impossible to activate this on a retail game without mods.

The Sonic the Fighters "Sound Test" uses a very clever trick. You can navigate sounds with up and down and play them with P1 punch. However, if you press "Service Coin", it simulates pressing down and punch to play the next sound directly from the service panel, no need to be at the controls!

And here is the rng changed to always return 0!

Here's the same scene but with the random number generator modified to always return 1!

It's not mind blowing, but it's really interesting! The attract mode, the opening cutscene of Sonic the Fighters, uses RNG! That's right, it uses RNG to calculate the blackouts on monitor watching the Death Egg II from the lab where Tails keeps the Lunar Fox! Here's how the scene looks normally...

Sonic the Fighters has several unused, full-screen, images in it's data, including a temporary title screen, a Fighting Vipers "Game Over" screen, as well as an AOU Show and Location Test version "Coming Soon" screen. #sega #sonicthefighters #datamining #tcrf

You can see how Honey reacts when blocking the various projectiles, and the heart projectile does not cause her to recoil.

When Fang uses the heart against Bean, it causes him damage. You can also see the heart bounces off the ground, and bounces straight into the air when blocked.

Sonic the Fighters has two unused projectile types: a flying hand, and a flying heart. The flying heart doesn't seem to affect all players equally, nor does it give recoil when using barrier against it.

All StF characters are made up of a series of objects which make up a player's model. A blue cube is positioned Inside the body object of the Tails model. This can be seen using debug mode's camera functions. The object number of this cube is 49, meaning it was probably added early in development.

If you use debug mode to change the current stage to Flying Carpet, the carpet spawns in the middle of the stage. This gives you a closer look at the vending machines near the body of water, otherwise impossible to see from the carpet when it follows it's path in the air.

On startup, Sonic the Fighters checks to see if it can read and write to the backup RAM. If it can't, it assumes the power supply's voltage is too low, and continues to run the RAM check until the test is successful and the game can continue booting.