Team Rocket has gotten their hands on a little Tyrunt, with plans to get it to evolve into a powerful Tyrantrum. It manages to escape by jumping from their balloon into a river, where it gets stuck in some rocks. Bonnie finds it and frees it, and the two of them begin to bond, while their friends watch in amazement. But Clemont can’t quite understand what a Tyrunt would be doing out there in the wild...

Determined as ever, Team Rocket grabs Tyrunt, Bunnelby, Dedenne, and Bonnie! Everyone soon gets free, and Bonnie comes up with a fun plan to defeat the hapless trio. A fierce battle ensues, Tyrunt evolves into Tyrantrum, and it’s blast-off time once again!

When Bonnie learns that Tyrantrum comes from the Pokémon Fossil Research Lab and already has a Trainer, she sadly realizes that it can’t travel with her. Tears are shed as Bonnie says goodbye to her new friend, but she promises to come back someday for a visit, and our heroes’ journey continues.