Complete the "Catchin' Lilipeas" quest and have a saved game from Chocobo Racing on the same memory card as the one used for Legend Of Mana. Enter the save screen, highlight the Chocobo Racing file, then exit out of the save screen. Go to Polpota Harbor. On the Polpota Harbor map screen Skippy, the thin big eared creature from the "Catchin' lilipeas" and "Huntin' Du'cate" quests, will appear and hand you a ring item called "Fastest Wheel".