Bertha

Bertha is a master Ground-type trainer of the Sinnoh Elite Four.

Bertha helped Roland get his Magby back from Team Rocket. Bertha, Ash, and friends chased after Team Rocket in Bertha's car until they battled them and got Roland's Magby back. Later, Bertha battled Ash's Torterra with her Pokémon, defeating him somewhat easily. She then advised him to be more observant in battles.