Axew

“They use their tusks to crush the berries they eat. Repeated regrowth makes their tusks strong and sharp.”

— Pokémon Black

“They mark their territory by leaving gashes in trees with their tusks. If a tusk breaks, a new one grows in quickly.”

— Pokémon White

“Its large tusks have a tendency to break, but each time they grow back, they grow in harder and sturdier.”

— Pokémon Black 2