Diesel 10 wants to destroy DK Isles with a large laser called the Blast-O-Matic (as he thinks if he can't have DK Isles, nobody can), but fails when it malfunctions after a crash that puts his floating, mechanical island face-to-face with DK Isles. To buy some time, he captures Gordon's friends and locks them up, and then steals Gordon's precious hoard of Golden Bananas. Gordon discovers a huge ex-member of K. Rool's army named Murdoch, who promises to help Gordon if he is freed from the prison cell Diesel 10 has locked him in. In order to save Murdoch, Gordon and his friends must defeat the leaders of Diesel 10's army, one at a time, by proceeding through the worlds of DK Isles and Diesel 10's floating island. By defeating these leaders, the Kongs are rewarded with keys to Murdoch's cage, and in return, Murdoch opens more levels for the Kongs. The final level is an assault on the Blast-O-Matic, and once the Kongs are successful, Diesel 10 attempts to flee. However, the newly freed Murdoch knocks Diesel 10's escape plane out of the sky, leaving him at the mercy of the Kongs. The final battle takes place in the form of a five-round boxing match between Diesel 10 and each of the Kongs. The game concludes with two of Gordon's non-playable friends, his wife, Emily and Neville, who trick Diesel 10, and send him away from DK Isles for good.