If it is a N64 wrestling game, No Mercy should be on the list of potential options. Revenge is good but that was the apex of the brief Golden age of wrestling video games that were spawned on the N64.
Personally my two favorites are Bomberman 64 and Winback, with the underrated puzzle classic Wetrix not far behind before the RE2 port, Ray man 2, Ogre Battle 64 and Rogue Squadron.
Although I don't know if it would count, but Rare supposedly published Conker's Bad Fur Day, so that by itself makes it the best third party game on the N64.







