Thank you for your response, Thomas! I just tested the GHB Screen Scrolling Pipes you linked as well. It appears it also breaks the Bowser Credit Screen unfortunately. Thank you for the suggestion about the SNES9x-rr! It's hard to pin-point when the game "breaks" as it is frozen after the fireworks display, although it could've possibly been broken before then, or anytime after Bowser is defeated. I only have some basic experience in ASM (created a basic block through ASM and have edited sprites as well, but nothing too experienced but am willing to learn more.)
Thanks again for your reply! I'll keep looking to find a solution for this issue.
Also, if anybody is interested I've uploaded an IPS
file of the original SMW game with the pipes installed. And an SRM
file so you can go straight to Bowser's Castle to test the credits in case anybody wanted to see this glitch firsthand.
Edit: After more testing I can narrow down the problem even more now. It's not the pipes themselves that break the End sequence, however ironically the Fixes.asm patch included in the pipe pack that breaks the ending sequence. Does anyone know if there's any way to modify the code to keep the ending sequence intact?
Edit 2: Issue is officially fixed, the credits plays fine now thanks to GreenHammerBro for fixing the issue which was stated would be included in a future update. This thread can be closed.