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There's a glitch with this game. In the MUSIC TEST mode, from the 15th tune, subsequent tunes have glitches. Opening the game, enter the MUSIC TEST mode, choose the 26th tune in a particular frame (in fact, other tunes can be, but No.26 is the front), wait for the screen to pass, press ST button and go straight to the end. I found this glitch in process of MMC3 hacking and don't know why this is so. What's the meaning of this movie? This is a very low-level work. This is probably not in conformity with the norm, sorry...

Game objectives

  • Emulator used: <FCEUX 2.2.3>
  • <Guess not.>

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<Explain here things the audience would probably like to see> <Explain also things that could be improved in your movie> <You may also suggest screenshots.>

Masterjun: Judging.
Masterjun: Resetting to new.
ThunderAxe31: Judging.
ThunderAxe31: This is a little movie, yet it features some interesting aspects that need to be properly addressed. airwe, please don't feel bad about it, because we actually appreciate this kind of submissions, as they help for setting new precedents and discovering new possible situations to figure out.
First off, there have been brought doubts about the legitimacy of the glitch itself, in the submission thread. It's indeed very suspicious how multiple people were unable to reproduce this game end glitch on more accurate emulators than FCEUX. However, that doesn't necessarily prove that the glitch itself is the result of inaccurate emulation, since there are potentially infinite variants for causing the glitch itself. But that also means that there are no guarantees that an actual proof will ever be found, and since we can't keep a submission potentially forever stuck in the queue, it makes more sense to just reject it now and keep the idea that it could be potentially un-rejected in case a proof is found later... Except that for this specific submission it's never going to happen, as there are two more reasons why it should be kept rejected.
The second issue is about the usage of the music test mode. We don't allow cheats and debug functionalities, because these are found outside of intended gameplay. I found no evidence suggesting that the method for accessing this sound test is mentioned in-game or in the official game manual, which would make it allowed. Instead, I noted how the sound test allows to input invalid music track values, which highly suggests that this music test mode is a debug leftover, and not supposed to be accessed under normal gameplay.
Lastly, there is the biggest issue for this submission: triviality. As I also noted in the thread, by looking at the movie inputs and performing tests I could learn that this game end glitch can be triggered by meeting just two frame-perfect inputs, which would make it easily matched by human attempts. We can't accept movies that don't feature superhuman gameplay, as it's the main purpose of the site.
Rejecting for emulation issues, usage of debug feature, and triviality.


TASVideoAgent
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This topic is for the purpose of discussing #6290: Airwe's NES Kid Niki 2 "game end glitch" in 00:12.18
MESHUGGAH
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Looking for an encode. edit: Thanks Spikestuff! I liked it, short and jumps to the ending, good job airwe! I'm unsure about does the music test code (b+select?) is allowed to use. While it's not a cheat code, it's also not an integral part of the gameplay. Also I don't think it's mentioned anywhere. Voted yes.
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Spikestuff
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Not going to lie. Wanted to gif the encode: Link to video I feel we actually need to get a console verification on this one (or replicate it on NESHawk and Mesen). I'm on the fence with this one as it can possibly be a technical foul with FCEUX. I personally do want to see a console verification of this bug so we can confirm it's not a tech foul. It's short, cute but has a cloud over it.
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I can't resync it for NesHawk. But beside that, in my opinion there is bigger problem: triviality. From my tests, it seems that even if you do begin pressing most buttons in advance, you still get to the sound test at the same moment, due to the large presence of lag frames that nullify human mistakes. The only two inputs that need frame precision are the moment in which you let go of Down button and the moment you press A button. This would be clearly trivial to reproduce in real time attempts.
my personal page - my YouTube channel - my GitHub - my Discord: thunderaxe31 <Masterjun> if you look at the "NES" in a weird angle, it actually clearly says "GBA"
nymx
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There really isn't much to see here, it almost seems like watching an Arcade Machine boot up; however, I can certainly appreciate the knowledge behind making a TAS to trigger the end game credits. Leaning towards meh, but the technical pushes me to a Yes vote.
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Would this glitch still work if the 26th music appeared in game outside the music test on certain frames?
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jlun2 wrote:
Would this glitch still work if the 26th music appeared in game outside the music test on certain frames?
I'm pretty sure that the 26th doesn't exist, which would cause the game to read to unrelated data. In this sound test you can pick any value from 0x00 to 0xFF, which clearly goes beyond the game data... That's probably a programming overlook.
my personal page - my YouTube channel - my GitHub - my Discord: thunderaxe31 <Masterjun> if you look at the "NES" in a weird angle, it actually clearly says "GBA"
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Yes Vote!
DrD2k9
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FWIW, I can reproduce this in FCEUX, I can't reproduce this in BizHawk using either the NESHawk or QuickNES core.
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No need to apologize, airwe. It's great to see games broken like this. Definite yes vote if it's legit.
CoolHandMike
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I love unusual stuff like skipping straight to the credits. Can't vote yet, but if I could...yes.
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