This pokeball was thrown by a Trainer in the episode I Choose You Pikachu. That trainer was presumably Bruno. Another Green Pokeball was held by Brenden on a Nintendo Power subscription sheet that came with the Pokemon Ruby and Pokemon Saphire gameboy games.
This toy lets you find and battle up to 105 Pokemon inside the virtual Pokemon world. Connect to your friends Cyber Superball or Cyber Hyperball for battles. Also capture and exchange your Pokemon. This toy is no longer available for retail.