While trying to find Ash and the others, Ash’s Pokémon are found by Team Rocket’s Pokémon, Koffing, Ekans, and Meowth. Meowth tells Koffing and Ekans to attack Ash’s Pokémon, only to find out they won’t battle for him because he is not their “master”. They also tell him that they are not bad guys and only take bad orders from their masters, much to Meowth’s dismay, leaving him unable to battle Ash’s Pokémon. Each side tells the other about their missing Trainers and Koffing and Ekans get visibly upset when Bulbasaur mentions that their Trainers may have abandoned them. Pikachu immediately refutes the very idea, telling Bulbasaur that Ash would never do something like that. The two sets of Pokémon join together to find their Trainers. Meanwhile, Meowth is tied up for what he has done to Pikachu and the others in the past. While they are eating, a giant Rhydon frightens them. The Pokémon escape, accidentally leaving Meowth tied up. Pikachu unties Meowth so he can escape. Meowth shows no gratitude for Pikachu’s action, instead pushing him and saying that he could have got out himself. At the same time, Ash and his friends are being chased by a giant Zapdos. They soon elude it and decide to rest for the night. Ash vows to find his Pokémon no matter what. Meanwhile, Jessie and James are being chased by a huge Moltres. They run into a sign and are both knocked out, causing them to escape the Moltres.
(Source: Bulbapedia)