These are the tools for MK64 ROM hacking.
MK64 Pitstop contains features to edit textures, edit and import karts, edit text, a W.I.P. Course Viewer, and a bugfix for Post Race/Battle crashes.
The MK64 Mod Tool is a tool that allows you to tweak any of the 8 characters in many ways.
-Modify speed for each character on 50cc, 100cc, 150cc, Extra and Battle Mode.
-Modify acceleration for each character.
-Modify weight for each character.
-Resign ROM OK, has compatibility with emulators and Nintendo 64.
Tool for editing the Mario Kart 64 EEPROM save file.
-A work-in-progress Course Viewer
-MK64 Rom Documentation