Based off a random thought I had if the ending had a special scene after the credits rolled. Turbo didn’t actually die because his code was tampered with when he re-programmed Sugar Rush. Instead Turbo and the cybug he was fused with become separated and he looks after it as a pet. They both take refuge in Diet Cola Mountain. The end.
This was meant to be cute, but after a few experimenting tweaks it ended up being a little bit sinister.