This article has a talk page!This page details bugs of Sonic the Hedgehog (DoJa, J2ME, BREW).
Invincibility Frame Glitch (J2ME)#
In Part One, pausing the game (using the Right Softkey) brings up the pause menu and pauses pretty much everything in the game, except for Sonic's invincibility frames upon taking damage. This can leave the player especially vulnerable to enemy attacks if a ring is not immediately picked up after closing the menu. In essence, this is a reversal of the iconic Mega Man (NES) pause glitch.
This bug was partially fixed in Part Two, in which opening the pause menu does pause Sonic's temporary invincibility, but then going into the "Back to Title" sub-menu resumes it again.
Glitches in Labyrinth Act 3 (J2ME/BREW)#
Watch on YouTubePerhaps due to the complicated nature of this stage with the infinite scrolling gimmick, several bugs and glitches made their way into the J2ME versions.
- The background noticeably "jumps" when Sonic is at a certain vertical position. This only seems to happen in the lower-resolution versions, not the 240x320 version that uses original-sized graphics.
- Going into a certain corner in the shaft at the end of the stage temporarily activates the blocks and the water for some reason, as if the boss is already active.
- It's entirely possible to jump over the boss spawn trigger and finish the stage without him spawning. Attempting to finish the stage like this will lead you to having to jump onto or over the invisible animal capsule first. This glitch also exists in the BREW versions.
Act Clear Storage (J2ME)#
Watch on YouTubeThe game disables the pause button when Sonic finishes an act. However, suspending the game using the phone's controls and going back will open the pause menu. Going to the title screen and starting a new game (in some versions this has to be done in a timely fashion) will start Green Hill 1 already with its score countdown and the "press 5" prompt, and pressing 5 will start Green Hill 2.