Getting Started With Sonic Quoes for Sonic Advance 3
Sonic Quoes is a ROM hack for Sonic Advance 3 that changes several default mechanics to make the game feel different from the original release. I ran into this project about a year ago while browsing romhacking forums, and it stuck around because it does one specific thing reasonably well. The hack is available through the standard ROM hacking distribution channels — primarily ROMhacking.net and various Sonic modding Discords. You will need the original Sonic Advance 3 Japanese ROM (NoIntro verified) and a patch file in IPS or UPS format.
The core change revolves around reworking the stage layouts and checkpoint placement. The original Advance 3 has some notorious checkpoint issues where you can die repeatedly on the same stretch because the game loads checkpoints differently than the stage layout suggests. The patcher addresses most of these misalignments. If you want to apply the patch yourself, here is how it actually works. Download the IPS patch file and open a ROM patching tool like Lunar IPS or the online patcher at noclip.codewrite.org. Load your clean Sonic Advance 3 ROM, apply the patch, and save the output file with a new name so you do not overwrite your original. Then load that file in a GBA emulator — mGBA and BizHawk both handle it fine. I use mGBA for casual play and BizHawk when I need frame-perfect input recording. One detail people miss: the patch only works cleanly with the Japanese ROM, not the US or EU versions. If you try to patch a regional variant, you will get checksum errors and the game will likely soft-lock on boot. Verify your ROM hash before attempting the patch. A clean NoIntro ISO for Japan should give you a stable result.
What Actually Changes in the Hack
The most notable edits touch on three systems. Stage checkpoint locations are moved to make more logical sense relative to the level geometry. Some collision boxes are adjusted, particularly around spikes and bottomless pits that previously had generous overhangs the original game did not intend. And the ring collection radius is slightly wider, which reduces deaths from near-miss ring pickups that feel punishing rather than fair. There is also a speed adjustment in certain zones. A few stages run their physics frames at a slightly different tick rate, which makes momentum-based sections feel tighter. This is noticeable mostly in Chemical Plant and Aquatic Mine. If you are coming from the vanilla version, expect to lose a few laps in Aquatic Mine while you recalibrate your jump timing. The water currents hit differently here than in the original.
Common Problems and Workarounds
I hit one specific issue that took me about two hours to sort out. On certain screens in Crystal Square, the hack would display a graphical glitch where a background tile would flicker solid white for one frame and cause a subtle input lag sensation. It is not a hard freeze, but it is annoying during any kind of precise platforming sequence. The workaround is running the emulator with software rendering instead of hardware acceleration. In mGBA, go to Settings > Graphics and switch the renderer to Software. The glitch goes away entirely. It costs roughly two to three frames of latency on older hardware, but on anything from the last decade the performance hit is negligible. Another issue is save state corruption if you load a state that was created mid-checkpoint segment. The hack changes checkpoint data addresses from the original ROM, and older save states from the unpatched version will write to the wrong memory locations. I lost about four hours of progress this way before I started creating fresh save states after every patch application. Always start a new game from scratch after applying a ROM hack that modifies stage data. Do not rely on existing saves from the clean ROM.
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Who This Is For and Who Should Skip It
If you are a completionist who wants to beat every stage with all chaos emeralds on the original ROM, this is not the right patch. The hack intentionally makes some sections slightly harder by removing the forgiving collision overhangs that the original used as unofficial difficulty checkpoints. You will die more in the first hour. After that, your muscle memory adjusts and the game flows better because you are no longer fighting against broken checkpoint placement. If your goal is faster runs or competitive speedrunning, the checkpoint improvements alone make this worth installing. I clocked my best Crystal Square time down from about 4:12 in the vanilla version to roughly 3:48 after I stopped hitting the soft locks the original ROM creates near the final boss transition. That is a meaningful gap. The wider ring radius also helps with emerald hunting because you do not miss as many rings on close passes. For casual players who just want a fresh take on Advance 3 without installing anything, I would recommend sticking with the unpatched version or looking into the separate Sonic Advance 3 Randomizer project instead. The randomizer shuffles enemy placements and stage order but keeps the original ROM intact, which means no patching headaches and full save compatibility across all emulator states. Sonic Quoes is a better fit if you specifically want the checkpoint and collision fixes and are willing to accept the trade-offs that come with modifying the ROM.
