In Jungle Japes, the first fight with Army Dillo takes place in a jungle arena. Before the battle begins, Army Dillo rolls out of a cave and into the arena. Army Dillo pokes out from his shell, where two large cannons emerge. Army Dillo lets out a laugh and retreats back in his shell. The boss battle then begins.

For this battle, Army Dillo is equipped with two large retractable side-mounted fireball cannons and a metal shell. The battle mainly consists of Army Dillo retreating into his shell and shooting fireballs from his cannons. At first, Army Dillo blasts four fireballs at Donkey Kong. It briefly peeks out of its shell, letting out a laugh. During this opportunity, Donkey Kong must pick up a TNT Barrel and throw it at Army Dillo's head. The explosion blasts Army Dillo upward and short-circuits his shell, electrocuting him in the process. After this, Army Dillo retreats in his shell and rolls around, attempting to run over Donkey Kong. After a few seconds, Army Dillo returns to blasting fireballs, this time blasting nine of them at a faster rate. As Army Dillo pokes his head out again, Donkey Kong must throw another TNT Barrel at him. This short-circuits his shell again, electrocuting him in the process. In the third and final round, Army Dillo has the same pattern, but moves at a faster rate. He also fires eleven fireballs at Donkey Kong and retracts his head quicker after letting out a laugh. After being hit from a third TNT Barrel, the short-circuiting of Army Dillo's shell causes the cannons to blast off from his shell. Army Dillo flees in embarrassment and relinquishes the first Boss Key to K. Lumsy's cage.