Squirtle joins Ash.
Gary makes a brief cameo in this episode but never interacts with anyone.
In the dub, the Squirtle Squad threatens to dye Misty's hair purple, while in the original, they threaten to execute her.
In that same scene, Misty's reaction to the threat was changed to her threatening Meowth in regards to dying her hair purple. In the original she said that she would get the Super Potion for Pikachu herself.
This is the first time Ash has ever deliberately hurt a Pokemon, biting Meowth on the tail in this episode.
This is the third and final episode of a three-episode arc where Ash catches each of Kanto's starter Pokemon.