Jungle Jinx (accessed via Crocodile Cauldron)
Black Ice Battle (accessed via Krem Quay)
Klobber Karnage (accessed via Krazy Kremland)
Fiery Furnace (accessed via Gloomy Gulch)
Animal Antics (accessed via K.Rool's Keep)
One more battle against Kaptain K. Rool before you'll finally get some respect from Cranky Kong...
I truly had an amazing time conquering the Lost World in Donkey Kong Country 2, and enjoyed seeing the game's real ending for the first time in two decades... That was back when games were games.