Might need to add this if you fall through floor.

https://gbatemp.net/threads/a-beta-of-rares-dinosaur-planet-for-n64-has-been-dumped.583321/#post-9372530

Apparently it doesn't work on that cart. You need a 64Drive. Some people have it working with Fox falling through the floor. To which the fix is this "Here's the fix for everyone. Add DP=5 (and maybe NDPE=5) to your save_db.txt"