Rabbid Kong is a massive Kong-like Rabbid that appears in Mario + Rabbids Kingdom Battle as the end boss of Ancient Gardens, as well as the main antagonist of the Donkey Kong Adventure expansion. He also appears as a cameo in Mario + Rabbids Sparks of Hope. As his name implies, he is heavily based on Donkey Kong, right down to wearing his signature "DK" necktie. However, Rabbid Kong's posture and walk style are more realistic and more comparable to those of a real life gorilla than Donkey Kong's more cartoonish movements.

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Source: https://www.mariowiki.com/Rabbid_Kong