Before I knew about this topic, I changed the compatibility list to show that on the newest revision Asteroids Hyper 64 (U) [!] will not run. Before (tested on a 5.XX firmware on a 6XX rev) it ran at over 60 FPS and now it doesn't detect the memorypak and you select Continue without Saving and it runs at 2FPS
Hello, just tried this game and it works fine.
It seems you have RumblePak in Controller add-on (found in Global Settings), make sure to change it to MemPak.
Also if you could update the compatibility list since this is a user error.