SPEEPSHighway | 2 Player Mode Leftovers - Sonic Adventure 2 Battle @SPEEPSHighway | Uploaded 7 years ago | Updated 5 hours ago
Look, it's SA2B! Usually I'd play the Dreamcast game instead, but in this case you can't find most of this stuff in that version.
SA2B's 2 Player mode has a lot of leftovers in the stages that were added on to the GameCube release. Some are only minor, but others not so much.

Also don't worry about the lines and stretched text boxes, that's just a side effect of changing the screen size without turning off the 2P camera.