Ep 10. Mega-Mega Meowth Madness!

Ash, Pikachu, and their friends are on the road to Coumarine City where Ash plans to participate in his next gym battle. Meanwhile, Team Rocket is up to their usual antics and finds themselves suddenly caught up in a massive wave of energy, causing their Meowth to evolve into a Mega Meowth.

The Mega Meowth is incredibly powerful and uncontrollable, causing chaos wherever it goes. Jessie and James struggle to keep it under control as they try to figure out how to reverse the evolution, but their efforts seem futile. Meanwhile, Ash and his friends encounter a group of trainers who have been affected by the energy wave, causing their Pokemon to evolve into Mega forms as well.

As the group seems to be overwhelmed by the sudden power surge, they soon discover that a group of mysterious strangers is behind the energy wave. The strangers reveal themselves to be scientists, and they explain that they have been experimenting on Mega Evolution, hoping to gain a better understanding of the phenomenon.

The scientists offer to help Team Rocket reverse Meowth's evolution, but they require the group's assistance in capturing the Mega-evolved Pokemon that have been causing chaos around the city. Ash and his friends are hesitant to work with Team Rocket at first, but they realize that the situation is urgent and they need all the help they can get.

The group sets out to locate and capture the Mega-evolved Pokemon, but they soon realize that they are not the only ones on the hunt. A group of rival trainers is also after the Mega-evolved Pokemon, hoping to capture them for their own purposes.

The group is faced with a difficult decision - whether to work with Team Rocket, who has caused them so much trouble in the past, or risk losing the fight against their rivals. Ash and his friends ultimately decide to team up with Team Rocket and use their combined strength to capture the Mega-evolved Pokemon.

After a hard-fought battle, the group is successful in capturing all of the Mega-evolved Pokemon. The scientists are grateful for their help and use the information gathered from the experiment to create a device that can reverse Mega Evolution.

Team Rocket is finally able to reverse Meowth's evolution, and the group continues on their journey to Coumarine City, confident in the knowledge that they have come out of the situation as stronger and more capable trainers.