C3KO

C3KO was a Hitmonlee that Red received as a gift from the Karate Master in Saffron City.

History
Red could have picked either the Hitmonlee or a Hitmonchan. This decision was remarkably similar to an earlier, critical decision in Mt Moon—whether to pick the Helix Fossil or the Dome Fossil. Both cases had two items on the ground next to each other. After defeating the fighting dojo, Red picked the Hitmonlee, and it was immediately sent to the PC. Red accessed the PC shortly after, and C3KO was released a mere 38 minutes after being given to Red.

Name
In-game, C3KO was named 'CCC'. The Twitch chat quickly nicknamed him 'C3KO' as a reference to the Star Wars character C-3PO.

Lore Interpretations
Some lore depicts him as having sacrificed himself so that the Keeper, the Helix Fossil, and the SS Ticket could be withdrawn from the PC.