@mitu Thanks for the reply. I apologize, I'm rather new to using RetroPie on Ubuntu. I was just going by what the default value was on the emulator selection screen when you press a button while the ROM is launching.
9247c15c-3e81-4c7c-bd79-bea1c6087614-image.png
I ended up installing lr-mupen64plus-next as you suggested, and the difference is amazing :) This is what I was hoping for. Thanks!