Kudgel is big, strong, and somewhat unpredictable. King Zing Sting is a gigantic Zinger who's vulnerable in his stinger. There are lots more also. This game does have a few quirks however. The hit detection isn't as lenient as it was in DKC and some enemies come from nowhere to attack you.
Some levels are frustratingly difficult and the objects to some levels can be a little difficult.
Finally, the biggest problem is that everyone asks for money. But this is counteracted by knowing where to go to get them. Levels are sometimes so hard, you don't want to find all of the secrets. But there's still lots of stuff to do. The trivia game is pretty fun and the roller coaster levels are fast and furious.