Hello there! I have a problem with Donkey Kong Country 3. The game works almost perfect until a certain point.

After I have played through the first level of the third world (sea level), the game freezes just before I can finish the level. Can anyone help me to fix this problem?

 

I've always played in an emulator for that level. Use an emulator and then transfer the save back to your card, and you should be okay for a while.