Sonic the Hedgehog 3C (prototype 0408)/Hidden content

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Back to: Sonic the Hedgehog 3C (prototype 0408).

Level select

SK level select.png

Enabled by default. Scroll down and select "Sound Test" on the title screen.

Edit mode

Sonic3C0408 MD Comparison DebugMonitors.png

Play sounds 01, 03, 05, 07 in the sound test. Hold A + Start while selecting a level.

All Chaos Emeralds

Play sounds 02, 04, 06, 08 in the sound test. A Chaos Emerald sound will confirm correct entry.

Night mode

Sonic3C0408 MD NightMode.png

Enable the edit mode code above and hold C+Start when selecting a level.

Unused content


Art Description
Sonic3C0408 MD Sprite LRZ2DeathEgg.png
An earlier version of the Death Egg sprite seen at the end of Lava Reef Zone Act 2, found in the ROM padding area. It's using the colors of the enemy palette line ($01) and the shading differs in areas[1].

Sonic 3 ending leftovers


Big Arm cannot be fought in this prototype, but its data from Sonic the Hedgehog 3 remains intact and can be hacked back in to the game. Once restored, it can be fought and defeated as normal, and the ending from Sonic 3 will take place, followed by the credits. This time however, Knuckles can also get this ending, and uses all the correct poses until the giant Sonic sprite shows up, messing up Knuckles' palette. For some reason, the screen fades to the credits a slightly faster than it does for Sonic & Tails[2].


Sonic the Hedgehog 3C (prototype 0408), prerelease version of Sonic the Hedgehog 3
Sonic3 title.png

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Part of Sonic the Hedgehog 3 development