Episode Title:
The Tiny Caretaker!.
Episode Description:
When Team Rocket tries and fails to steal a Tyrunt from a Pokémon fossil research laboratory. Bonnie finds Tyrunt stuck between some rocks in a river and rescues it. Bonnie and Tyrunt try escaping from Team Rocket, but get cornered. When Team Rocket drops Bonnie from above, Tyrunt evolves into Tyrantrum and saves her life. After Tyrantrum beats Team Rocket, its original owners take it back to the laboratory.
