I think theres a glitch with the bike where if you stop riding after the cutscene your sprite glitches out and either goes a black square or a bright pink mess and parts of the map are glitched too. Saving and resetting doesnt seem to prevent it if you stay on the bike but entering a new place to reload the map while staying on the bike prevents it from happening.
Is this supposed to happen im on a 3ds so im using the nds bootstrap tool. Maybe that’s why but idk.