It has a stubborn, individualistic disposition. Eating dirt, making mud, and playing in the mire all form part of its daily routine.
– Pokémon Moon Pokédex
Mudbray is the Donkey Pokemon, even though it evolves into the “Draft Horse” Pokemon.
Its unique ability, Stamina, increases is Defense by one stage when hit by an attack, making it a pretty good tank Pokemon. I had a Mudbray in one of my nuzlocke runs, and it was very useful.
Stat-wise, it has high Attack and pretty good Defense, but is slow.