Activating this trainer:

Press F1 at main menu.

Listen for 'Trainer Activated'.

Press desired hotkey. All hotkeys can be changed on the trainer.

Trainer Options:

Numpad 1: Unlimited Rings

Numpad 2: Super Sonic

Numpad 3: Unlimited Lives

Numpad 4: Max Score

Numpad 5: Freeze Level Timer

Notes:

Numpad 1: Unlimited Rings - toggle on and when you take damage the rings will explode out, but you do not lose any

Numpad 2: Super Sonic - toggle this on and sonic deals damage automatically to enemies rather than getting damage when he strikes enemies. Also spikes and projectiles do not damage sonic. This is almost like automatic kill enemies and invincibility in one option.

Numpad 3: Unlimited Lives - toggle on and you always have 99 lives.

Numpad 4: Max Score - toggle on and when you score again, you have the max possible score.

Numpad 5: Freeze Level Timer - toggle to freeze the level timer.