Yeah, I didn't believe it either at first. But as it turns out, Cinccino's base Attack stat is 95, while Hawlucha's is 92? What? You're telling me that my adorable little scarf chinchilla who looks totally harmless hits harder than Hawlucha, who the Pokedex describes as the WRESTLING POKEMON? Why?!
My theory is that Cinccino is able to use it's long scarf-like pieces of fur to wrap up and suffocate enemies, giving it deadly offensive capabilities in close quarters.
Another possibility could be that Cinccino's tail is the source of its power. Minccino and Cinccino's signature move, Tail Slap, has a maximum of 125 base damage. One would think they would need extremely strong tails to deal such substantial damage.