Professor Oak is the professor of the Kanto Region. He resides in his research facility in Pallet Town. At the beginning of the story in RGYB, he teaches the player the game mechanics such as catching the creature and weakening it. The player will be asked by the professor to choose one of the three starters: Bulbasaur, Squirtle, or Charmander. He then asks the player to do one favor for him, catch all 151 Pokémon. If the payer does so the layer would receive a game certificate.
Blue (Your Rival)
Blue is Professor Oak’s grandson. In Pokémon RGYB, he is the rival trainer that you see grow. You first meet him in Pallet Town in the Professor’s Research Facility. He will be right beside you when selecting your starter. He will choose the starter that is a disadvantage towards your starter. From there, you continue to see him in places like the SS. Anne. Once you defeat the E4, he will be the champion you will have to face.
Evil Team: Team Rocket
Team Rocket is the evil team in RGYB. In these games, you see them in many situations like the Silph Co. takeover Lavender Town, etc. The head leader of this team is Giovanni. As the player, you must battle against the grunts and leaders to stop them from their mischievous plans. Good Luck!