From the Super Mario Wiki
Cheesy Chesters are enemies appearing in Donkey Kong Country: Tropical Freeze. They are hunched rodents, resembling suburban rats, sporting vermilion-colored fur, indigo skin, a big violet snout, big ears, and small eyes. Their habitat is Autumn Heights, where they can be mostly encountered in cheese-cave themed areas such as Crumble Cavern and Rodent Ruckus.
Cheesy Chesters are antropomorphic animals, as they are capable of walking on only their back feet, swinging their front feet in a human manner. However, when they see a Kong, they will start walking on all fours and charge at the characters. The Kongs will lose a heart point if they simply touch the enemies. A stomp on their backs will defeat them, as can rolling or charging into them with Rambi. Ground pounding near a Cheesy Chester will stun the enemy, making it sit down and rock back and forth dizzily.
In Rodent Ruckus, Cheesy Chesters are seen exploiting the mine and extracting the cheese from within the ores, using simple mechaninsms consisting of ropes and beams. This, along with their ability to walk bipedally, shows that Cheesy Chesters are sapient animals.