Of Gary's ten Badges, the only ones from the same Gyms Ash battled at are a Boulder Badge, a Cascade Badge, and a Rainbow Badge. This indicates that Gary did not battle, or at least did not defeat, Lt. Surge, Sabrina, or Koga. It is already known he did not battle Blaine due to believing that Cinnabar Gym closed down long beforehand.
This was the first episode to air after the release of Pokémon Yellow.
Gary meets Team Rocket for the first time.
Gary is revealed to have won ten Badges and obtained a Nidoking and an Arcanine.
Ash earns his eighth and final Badge, the Earth Badge, after defeating Team Rocket, thus completing his requirement to qualify for the Pokémon League.