Uploaded February 2024 | Updated September 2026, 2 weeks ago
This game hasn't even been out for 2 entire months and this song has already been remixed to hell and back, but as the guy who remixed the M&L Partners in Time boss theme, aka "the second-most popular song from the game" not once, not twice, but three times, I didn't let that stop me.
So yeah, if you're following me on Twitter, you might have noticed that UNDERTALE Yellow had me in a chokehold for a solid month or so after I played it, and I'd by lying if I told you that I'm completely over it by now, but the brainrot seems to have subsided enough to at least let me take a step back and reimagine one of my favorite songs from its fantastic OST. I'd love to tell you that I chose this symphonic metal-ish style so I could let the solo violin represent the elegance of Ceroba's attacks while the guitars symbolize the anger bubbling beneath, but honestly it's not that deep, I only came up with this just now while writing this description. I just think that violins and metal elements go super well together, especially in the context of fast-paced boss music. Quite a few of the ideas here were lifted straight from some of Yukihiro Jindo's tracks from the Ys Super Arrange albums, which I consider basically the pinnacle of this style.
Oh, and, by the way, in case you stumbled upon this remix without knowing UNDERTALE Yellow, it's a free fanmade prequel to UNDERTALE and if you liked the original, there's a very high chance you'll like this too. Did I mention that it's free? Go download it already, it's really good: gamejolt.com/games/UndertaleYellow/136925
Original song made by @MasterSwordRemix , @NoteBlock , @Figburn and emBer (couldn't find your channel, sorry!).
Did you like my take on this certified banger of a song? Do you want to brag about how you definitely managed to get through genocide Ceroba without getting hit on the first try? Please tell me in the comments!
My Twitter account: twitter.com/ToadsworthLP
Discord server: discord.com/invite/GK3uMuB
Normally I'd put some info about how you're allowed to do pretty much anything you want with my rendition of this song that's not just a straight reupload or extension or whatever, but there has been some copyright controversy around the UNDERTALE Yellow OST, so I'd exercise caution for now.
UPDATE: I haven't received any kind of copyright claim during the 3 days since I uploaded it, so it seems to be safe from Content ID shenanigans. Still, I can't guarantee that it'll stay this way, and should the status change, this part of the description will be updated to reflect that.
This game hasn't even been out for 2 entire months and this song has already been remixed to hell and back, but as the guy who remixed the M&L Partners in Time boss theme, aka "the second-most popular song from the game" not once, not twice, but three times, I didn't let that stop me.
So yeah, if you're following me on Twitter, you might have noticed that UNDERTALE Yellow had me in a chokehold for a solid month or so after I played it, and I'd by lying if I told you that I'm completely over it by now, but the brainrot seems to have subsided enough to at least let me take a step back and reimagine one of my favorite songs from its fantastic OST. I'd love to tell you that I chose this symphonic metal-ish style so I could let the solo violin represent the elegance of Ceroba's attacks while the guitars symbolize the anger bubbling beneath, but honestly it's not that deep, I only came up with this just now while writing this description. I just think that violins and metal elements go super well together, especially in the context of fast-paced boss music. Quite a few of the ideas here were lifted straight from some of Yukihiro Jindo's tracks from the Ys Super Arrange albums, which I consider basically the pinnacle of this style.
Oh, and, by the way, in case you stumbled upon this remix without knowing UNDERTALE Yellow, it's a free fanmade prequel to UNDERTALE and if you liked the original, there's a very high chance you'll like this too. Did I mention that it's free? Go download it already, it's really good: gamejolt.com/games/UndertaleYellow/136925
Original song made by @MasterSwordRemix , @NoteBlock , @Figburn and emBer (couldn't find your channel, sorry!).
Did you like my take on this certified banger of a song? Do you want to brag about how you definitely managed to get through genocide Ceroba without getting hit on the first try? Please tell me in the comments!
My Twitter account: twitter.com/ToadsworthLP
Discord server: discord.com/invite/GK3uMuB
Normally I'd put some info about how you're allowed to do pretty much anything you want with my rendition of this song that's not just a straight reupload or extension or whatever, but there has been some copyright controversy around the UNDERTALE Yellow OST, so I'd exercise caution for now.
UPDATE: I haven't received any kind of copyright claim during the 3 days since I uploaded it, so it seems to be safe from Content ID shenanigans. Still, I can't guarantee that it'll stay this way, and should the status change, this part of the description will be updated to reflect that.



![[April Fools 2018] Early/Unused Battle Theme - Mario&Luigi: Bowsers Inside Story Rip
[APRIL FOOLS 2018]
Recently, a fellow remixer named Purple (https://www.youtube.com/user/Purple1222119), with Envys help (https://www.youtube.com/channel/UCK1pMKtDayl1kxvfc8bZQSQ) discovered an all-new music track hidden deep inside the games ROM: MUS_SEQ_B_BATTLE.sseq! Envy later uploaded a video of this sequence played using the final Boss Battle Themes samples. The file is only present in the 1.0 versions of the US and japanese ROMs, it has been removed from all european releases.
The reason why nobody discovered it earlier is the crazy compression on this one: the sequence file was YAZ0 compressed, but also encrypted using a simple circular bitshift. But besides that, there was still a huge clump of binary data.
Today, I finally managed to decrypt it, which revealed that it was actually an extremely early version of the DS SoundFont format, with WAY LESS limitations. I eventually figured out how to convert it to a usable format and tried playing Purples SSEQ file with this new amazing SoundFont. In this video, I present the REAL way this early, unused battle theme should sound!
My Twitter account: https://twitter.com/Toadsworth1507
My Discord server: https://discord.gg/GK3uMuB
You can download this song here: https://drive.google.com/file/d/1cokMs7clJatPBIccwcpqJP651VCGpXqh/view?usp=sharing
This song inherits the license of Envys upload. [April Fools 2018] Early/Unused Battle Theme - Mario&Luigi: Bowsers Inside Story Rip](https://i.ytimg.com/vi/uM6Yym7M_cM/mqdefault.jpg)






