Lava

Lava is, like on Earth a naturally occuring and dangerous substance in the Donkey Kong Universe.

The first appearance of Lava in a Donkey Kong game is Donkey Kong Country 2: Diddy's Kong Quest. In this game lava was an obstacle found primarily in the area Crocodile Cauldron, a large volcanically active area.

In Donkey Kong Country 2's semi-sequel Donkey Kong Land 2 lava is slightly less common due to Crocodile Cauldron being fused together with the large and swampy Krem Quay to create Krem Cauldron

In Donkey Kong Country 3: Dixie Kong's Double Trouble lava makes a small appearance in the hidden world, Krematoa. Here a small pond of lava can be seen and quizically swimmed through after Krematoa's ancient volcano is re-activated.

This same pond of lava can be seen in Donkey Kong Land 3, the pseudo GameBoy sequel of Donkey Kong Country 3.

Lava also appears Donkey Kong 64, once again as an uncommon, yet dangerous obstacle.