Tails megascore glitch

The Tails megascore glitch occurs when, after Sonic dies, Tails hits an enemy repeatedly, racking up a huge score and several extra lives. It seems to happen because in the betas, Tails has poor AI, and simply mimics the moves Sonic makes. After Sonic dies, it's possible to control Tails to some extent just by pressing buttons; if you manage to make Tails hit an enemy, he will get stuck there. A video of it in action.

This bug occurs in all of the betas we know about; an easy way to reproduce it in the Wai beta is to go to Hidden Palace Zone, immediately spindash to the right, and press jump as Sonic dies.

In the final, Tails starts flying when Sonic dies, making him unable to hit enemies.