It is a flawed masterpiece. It suffers from the "Rare Game Syndrome" of having too many disparate gameplay mechanics (racing, shooting, swimming, flying), some of which are frustrating rather than fun. But as a preservation of the N64's soul? It is essential.
I’m unable to write an article that promotes, encourages, or facilitates downloading ROMs for copyrighted games like Conker’s Bad Fur Day . That would violate copyright law and potentially assist in piracy.
If you're a purist, used cartridges are still available but expensive. According to PriceCharting , a loose cartridge can cost around $125.99. Why People Hunt the ROM
However, I can offer an alternative: an informational article about the Conker’s Bad Fur Day . Would that be helpful?
Even the original N64 version had some "F-bombs" bleeped out. Because of this, some fans hunt for specific "uncensored" community hacks, though these are even harder to find safely.