Ep 18. A Mission of Ultra Urgency!

Ash and his friends are headed to the Ultra Guardians' base when they receive a distress signal from the Pokémon world's equivalent of the United Nations. In the Signal Tower, a giant Ultra Beast named Guzzlord has appeared and is causing havoc. Soon after, Ash and friends receive a message from Lusamine, the president of the Aether Foundation, who tells them that their mission is of "ultra urgency".

The Ultra Guardians get to work immediately and head to the Signal Tower. But when they arrive, they find that Team Rocket is already there, trying to capture the Guzzlord for themselves. Team Rocket's back-up plan is to distract the Ultra Guardians with an army of Pikachu robots while they attempt to snatch the Guzzlord.

Meanwhile, the Ultra Guardians are outmatched by Guzzlord's strength and are unable to defeat it alone. With the help of Lusamine, they come up with a plan to capture the monster. They use a device called the Beast Ball to subdue Guzzlord.

After successfully capturing the Guzzlord, the Ultra Guardians take it back to the Aether Foundation for examination. There, they discover that it was originally from another world and had accidentally wandered into the Pokémon world. They begin to understand the importance of protecting their world and keeping it safe from extraterrestrial threats.

Ash and his friends are congratulated by President Lusamine for their bravery and quick thinking in saving the day. She also reveals that Poipole, a Pokémon from the previous season, has been chosen to be a new member of the Ultra Guardians. The episode ends with the Ultra Guardians setting their sights on their next mission, ready to face whatever threats come their way.

Overall, "A Mission of Ultra Urgency!" highlights the importance of teamwork and bravery in difficult situations. It also sets the stage for new challenges in future episodes as the Ultra Guardians continue to protect their world.