Ep 43. Filling The Light with Darkness

Ash and his friends continue their journey in the Alola region and arrive at the Ruins of Hope, where they witness Tapu Fini forming a protective barrier around it. They learn that Tapu Fini is being weakened by a mysterious darkness and decide to investigate the situation. Meanwhile, Team Rocket is also in the area, plotting to steal Tapu Fini's power.

Ash and his friends approach Tapu Fini and are attacked by a group of wild Pokémon under its control. They realize that Tapu Fini's power is being used to control the minds of these Pokémon. Ash and Pikachu work together to break Tapu Fini's hold on the wild Pokémon, and they succeed. Tapu Fini then reveals that it is being weakened by a source of dark power that is threatening to engulf the region.

Ash and his friends decide to investigate the source of the darkness, and they soon stumble upon a mysterious cave. Inside the cave, they encounter a group of people dressed in black robes who are performing a dark ritual. It becomes clear that the cult is responsible for the dark power that is weakening Tapu Fini.

Ash and his friends confront the cult, but they are quickly overwhelmed by the cult's powerful Pokémon. Just when things seem hopeless, Tapu Fini appears and uses its power to disperse the darkness, revealing the cult's true intentions.

The cult's leader reveals that their goal was to use Tapu Fini's power to create a new world order where they would be the rulers. Ash and his friends are determined to stop them, and they engage in a fierce battle with the cult's powerful Pokémon.

In the end, Ash and his friends emerge victorious, but not without consequences. The region is left damaged by the cult's dark power, and Tapu Fini is weakened to the point of collapse. Ash and his friends rush to the Ruins of Hope, where they use their own light to fill the darkness in Tapu Fini. With their help, Tapu Fini is restored to full strength, and the region is saved from the cult's dark plot.

As the sun sets over the Ruins of Hope, Ash and his friends reflect on their adventure and the importance of protecting the light that fills their world.