Crash Bash: Adventure Part 21: Bearminator (Boss 2)
11At minimum, you need 6 Gems, 3 Crystals, and all 9 Trophies up to this point to reach this boss.
When starting it as a Good Guy, Aku Aku will warn you of the Polar Boss and his mechanical bears.
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This boss fight takes the form of a Polar Push battle.
First, the Polar Boss will summon his mechanical bears. More of them as he loses health. They will first lock-on to you to prepare a missile. If it hits, you get stunned like lightning and you basically lose right there.
Dodge the missiles, and then knock the bears into the water. When they're all gone, you get a missile of your own, which you then have to aim right at the Polar Boss, himself. Not his submarine.
After taking damage, the Polar Boss will then blow up a part of the metal ring you're on. If you reach a cracked edge instead of a normal curved one, you'll instantly fall with no way to recover.
Shoot that giant bear three times, and he's dead.
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You then get to move on to Warp Room 3. It seems to be some kind of dirty prehistoric place.
All 5 of the game types from Warp Room 2 get another variant here, as well as 6th type that makes its debut here right next to the 3rd boss, which requires 15 Trophies, 10 Gems, and 7 Crystals to access.