Boomer

Boomer (ブーマー, Būmā) is one of the Brothers Bear in Donkey Kong Country 3: Dixie Kong's Double Trouble!. Unlike the other bears, Boomer wears a construction hat and is a demolition expert.

Description
Boomer resided in the secret world Krematoa during the events of DKC3, likely because the other bears thought of him as too dangerous to have around. During his time in Krematoa, he made explosives as well as his own bomb shelter. When the Kongs ventured in Krematoa to meet him, they had to pay a fine of 15 Bonus Coins in order for him to set off an explosive to clear the way into the next level in the area. As such, he was key to finishing all the levels of the game.

Also during his time in Krematoa he stumbled upon an odd machine that runs on Cogs, found by clearing each level in the world. When all assembled, the device somehow returns Krematoa's volcanic activity and causes Baron K. Roolenstein's Knautilus to rise as well. Once this happens, the Kongs can face Baron for the final time and get the secret ending.