Donkey Kong is a gigantic creature that lives on the jungle world of Kongoland. While he is usually portrayed as a neutral character rather than taking sides in a conflict, he is fiercely territorial and has a volatile temper. These traits, along with his great size and strength, make him a potential threat to anyone who encounters him.
He takes baths in a giant bathtub with a giant shower head. He uses a giant back brush and a giant bar of soap, and wears a shower cap and towel (with his initials printed on it) for whatever reason. ("Kevin In Videoland")
Donkey Kong is a fast runner and a skilled climber, able to ascend trees and even Kongoland's volcano easily. ("Kevin In Videoland")
On one occasion, Donkey Kong fought for Mother Brain without explanation: he participated in a wrestling match on the side of the Forces of Chaos, and easily defeated Captain N and Kid Icarus by sitting on them. ("Videolympics")