Serpent's Trench Map

Definitively... just in the case, if anyone might want to modify minecart graphics, what should he do?

Considering it's Mode 7... pray for divine assistance? Unless you're talking about the mine cart sprite that shows up once before/after that section, then there's a better answer.

There may be a better way to swing that cutscene that ignores Mode 7 entirely, like having the mine cart travel travel sideways along a stretch of generic mine cart track using the game's normal sprites and have it loop position after battles via event hacking. It would look more polished than the lousy cutscene used in vanilla.