If you search for "Pokemon Sun Moon Episode 140" on fan forums, you’ll notice a recurring comment: "This is the best 'quiet' episode in Pokemon history."
The episode’s climax features a double Z-Move performed by Ash’s Pikachu and Naganadel alongside the Masked Royal's Pokémon. The combined force of the Z-Moves is enough to blast the Guzzlord back through the Ultra Wormhole, effectively ending the invasion. Pokemon Sun Moon Episode 140
This episode is renowned for two massive status-quo changes in the series: Naganadel’s Surprise Return: If you search for "Pokemon Sun Moon Episode