Regular Show: GO! is a spin-off of Regular Show created by Brandon Frangipani. Seasons 3, 4, and 5 will have "Iron Rigby" in Seasons 3, 4, 5, and 6 episodes.
In the year 2016, The Collector (a man in a robotic wolf costume and robe) invades the park and collects some of its employees (Benson, Muscle Man, Pops, Hi-5 Ghost, Eileen). Mordecai, Rigby, Skips, and Brandon must stop the Collector before he takes the whole world as his chess set.
Seasons 1 and 2 Villain - The Collector
Season 3 Villain - The Dark Soldier
Seasons 4 and 5 Villain - Mavez O'Joey
Season 6 Villain - Dogs of War Experiment #2
Seasons 7 and 8 Villain - Rufus Ferguson
Season 9 Villain - Eric Von Richtofen
Season 10 (final season) Villain - Shin-Ryu