Green

Green is Professor Oak's grandson in Twitch Plays Pokemon FireRed, as well as the Rival to Alice. After Alice chose a Machop as a starter, Green chose Horsea as his. He ended up being a much tougher rival than Generation 1's Blue.

His team (besides his starter) varied during each match against him.
 * Lavender Town - Fire types
 * Silph Co. - Water types
 * Champion - Normal types