@DTEAM Thanks for letting me know, I will have to look into that. It's great that Smash 4 is working for you on the Pi, I am honestly surprised to hear that it is.
I dumped my cart and so I am not sure what version I was using, I will look into the one that you are suggesting. That said, I don't think it was a bad dump because the game played fine on Vulkan except for the usual Citra Vulkan visual artifacts. That said, on GLES with my build, most of the Smash stages were completely unplayable for multiple reasons. First is because of various colored boxes obstructing the screen on battles stages and even the menus (I assume that these are problematic textures for GLES such as incomplete mipmaps but I am not sure). Also Little Mac was neon green and looked like the Hulk for some reason. Finally, the game ran at ~30% on my aggressively OC'ed Pi4 and I recall that disabling right eye did very little to help (I am surprised to hear that it is 100% on the Pi5).
I am still running MESA 24.2.9 (the current default for sudo apt install mesa-vulkan-drivers), and so that could definitely be a possible reason for our difference in experiences. I do want to eventually upgrade to 25.1.0 to get the dual source blending functionality (especially for dolphin) but I decided to just wait for mesa-vulkan-drivers to catch up. I may need to fast-track that though if these newer mesa drivers are truly delivering this kind of enhanced Borked3DS gles performance.