Garrett Bobby Ferguson

Garrett Bobby Ferguson (G.B.F.), also incorrectly referred to as Giant Bearded Face or Giant Beardo Face, is the main antagonist who appears in the episode "High Score" and is from outer space. He was also the universe record holder for an arcade game called Broken Bonez. That is, until he was dethroned by Mordecai and Rigby which caused him to die in an explosion of goo. He is a parody of the world renowned videogame highscore champion Billy Mitchell, who currently holds the record for playing a perfect game of Pac-Man. Garrett also appeared in Video Game Wizard, but as a bronze statue. The Ferguson Convention Center is highly probable that it was made due to him, since he was known to be extremely talented at video games.

However, his son, Garrett Bobby Ferguson Jr., later destroys the park to create Exit 9B to summon all villians from episodes past, even his father. But after the gang team up with the help of numerous allies, G.B.F. is eventually sent back into the portal with the other villians. Before he die again, he said to his son that he's disappointed in him for being fooled by Mordecai and Rigby.

Appearance
G.B.F. appears to be a giant floating head with long, brown hair, and a beard, who can grow arms, and legs. His face closely resembles that of Billy Mitchell, an electronic sports player whom has been claimed by some as the, "greatest arcade-video-game.

Trivia

 * He could have owned the Ferguson Convention Center before he died.
 * He is nicknamed "Giant Bearded Face" by Mordecai and Rigby and "Giant Beardo Face" by Mordecai, since his initials are GBF.
 * In "Yes Dude Yes", Mordecai said to CJ, "...his head just exploded, like, blah!" He is most likely talking about GBF.(Garrett Bobby Ferguson)
 * The man in the promo for Season 4 resembles him, but, strangely, with an actual human body and an eye patch. This was confirmed to be his son, GBF Jr.