In which episodes of Pokemon did Ash encounter the mythical beast? (Excluding theatrical version)

Episode 2 (Encountering the Phoenix King)

Plot summary: Pikachu was seriously injured after a fierce battle with Spearow. Xiaozhi took it to the nearby Evergreen City. On the road, he encountered Miss Junsha who was chasing two suspects. After confirming his identity through the illustrated book, Xiaozhi and Pikachu were sent to the Pokémon Center by Miss Junsha. While Miss Joy was dealing with Pikachu's injury, Xiaozhi talked to Dr. Oak on the phone and told Dr. Oak that he saw strange Pokémon, but Dr. Oak didn't quite believe him.

Episode 188 (Encountering Thunder God)

Plot summary: On the way to Asakusa City, Xiaozhi and his party met their old friend, photographer Archer. Archer told Xiaozhi that he was capturing a legendary Pokémon, Freezebird. At this time, a large piece of ice suddenly fell from the sky. Inside the ice was a frozen Sunseed. In order to save the sun seed, Xiaozhi took him to a nearby hotel. The owner and his wife of this store take commemorative photos with a large group of sunflower monsters every year on their wedding anniversary, and this day happens to be their golden wedding anniversary...

Episode 190 (Encounter Frozen Bird)

Plot summary: Team Rocket, who wanted to set a trap on the mountain, was trapped in the mountain by a snowstorm, and was later sent to the Pokémon Center by Frozen Bird. Xiaozhi learned about the legend of the Frozen Bird from Junsha, and decided to go with Archer to photograph the Frozen Bird. Team Rocket, who heard the news, followed. In the end, Xiaozhi and Archer were rescued by the Freeze Bird at the end of the mountain road in the snowstorm, and Team Rocket also took the opportunity to capture the Freeze Bird...

Episode 243 (Encountering the Lightning Bird)

< p> Plot summary: Team Rocket appears again and wants to steal the crystal. The power of all electric Pokémon is being sucked away by Team Rocket. At this moment, the legendary bird Pokémon, Zapdos, appeared and sacrificed his life to save other Pokémon, and beat away Team Rocket with the crystal, but he also fell down due to exhaustion of power. Can Xiaozhi recover the crystal and save Lightning Bird?

Episode 264 (Meeting Emperor Yan)

Plot summary: Xiaozhi and his party were heading to the top of the Silver Mountain when they saw strange fluctuations in the sky suddenly, and an unknown totem fell and hit them. Xiaoxia. This unknown totem appears to be weak. Xiaoxia said that the collision just now made her see an unknown totem, and she saw an incredible place. After a night of care from Xiaozhi's young Kiras, the unknown totem seemed to have recovered early the next morning.

Team Rocket suddenly attacked, and the trio of Team Rocket were knocked away in the melee, but Xiaozhi and his party were also transported to a strange world, where Pikachu and Togepi became very huge...