- Back to: Knuckles the Echidna in Sonic the Hedgehog 2 (prototype 0524).
The "Knuckles the Echidna IN..." banner of the title screen does not appear, although the title descends from the center to make room for it. The PRESS START text is also slightly lower.
Knuckles acts erratically in the demos.
Sonic 2 cheat codes are still implemented and can be accessed through the Sound Test and playing certain music tracks in a row.
"Sonic" still finishes acts.
"Sonic" also still collects Chaos Emeralds.
All Rings are lost after exiting a Special Stage. In the final version, they remain after exiting the Special Stage.
Super Knuckles still uses the palette designed for Super Sonic...
...and when reverting back to his normal self, he becomes the fabled "Blue Knuckles".
Due to the change in how his Super form is activated, there is no Super bug after the endpost.
In Casino Night Zone Act 1 the game crashes every time the first flipper is used to go to the top left of the map where the hidden rings/ bumpers etc are. It only seems to freeze after the farthest-right bumper from the top is hit. If holding Left all the time while rising, Knuckles will fly over that bumper and it won't freeze. It also freezes when getting near it while walking on the right (use Debug Mode to place monitors to walk on). It freezes when Knuckles walks right under it when coming from the left. Flying over it as stated before works.
When the title screen appears after exiting the Special Stage using + , the top portion of the logo, including Knuckles, will not bounce down to the bottom of the screen like the rest of the logo.