Rigby: Who you calling? (Mordecai stops shifting through pages and points to a number on the book) (Mordecai picks up a phone book and starts sifting through pages) But we're not number one until we do this. Rigby: What!? Uh! Did you not hear what we just did? We were hilarious! Rigby: O-O-O-h! Oh, Mordecai, we're the best prank callers ever, aren't we? (Mordecai and Rigby laugh their hardest and Mordecai hangs up. Mordecai: Oh, dude, he's still on the phone! Mordecai lets go of the phone with Benson still talking) Whenever this is coming from, I will track you down and I will find you.! Mordecai: Hey, Benson, you got any books by Joe Mama?īenson: Who is this? (Mordecai and Rigby laugh even harder than before. He is sitting in his easy chair when the phone rings) Rigby: Hey, Skips, do you have a son named Joe Mama? (Both Mordecai & Rigby laugh, and call Skips, who is seen lifting weights) Rigby: Please hold for a collect call from. Pops is ironing his pants when the telephone rings.)

But you know what is even funnier than watching prank phone calls? Mordecai: Ye-e-eyah, I guess he's pretty funny. Rigby：The Master Prank Caller is the funniest thing on the internet, right, Mordecai? Master Prank Caller：I-m-a sure glad I ain't Joe Mama! (Mordecai & Rigby both laugh at the prank call video) Oh, yeah! You just got pranked by the Master Prank Caller!

Goofs: His past self was shown to fight as one of the fallen enemies in ' Exit 9B', despite having an acquaintanceship with Mordecai and Rigby, and never died on-screen.Master Prank Caller：Oh, yes, this is i'm a sure.

He has the power to call people with the buttons on his body.

The Master Prank Caller may have somehow inhabited the 1980s (possibly '82), since he is an 80s-esque cellphone.

Sam Marin and Tim Curry were not the original actors in mind for the role James Earl Jones, known for providing the voice of Darth Vader in the Star Wars films and Mufasa in The Lion King, was the original choice, but was not able to voice the character for unknown reasons.

It is later revealed that he is a decaying body inside. The Master Prank Caller is a white 80's-esque cellphone, and has human arms and legs. In ' Exit 9B' he is one of the villains to be revived by Garrett Bobby Ferguson Jr., despite him being on good terms with Mordecai and Rigby. In the end of the episode, Mordecai, Rigby, and the Master Prank Caller became acquaintances, and all three prank called Benson. They find the door, and before they go home, listen to a heartfelt speech from the Master Prank Caller's decaying body. After a long chase, they stop him and return to the present through a place filled with doors and a specific year is labeled above each. They try to return to the present by sending Benson, Pops, and Skips there to help them prank the Master Prank Caller. However, it goes wrong and they are transported to 1982 by him. Mordecai and Rigby decide to be prank-callers like him and try to prank him. He first appears in the episode ' Prank Callers', pranking an old lady on the internet. He also (underneath his phone armour) vaguely resembles an alien like ET.

He can even send prank-callers he pranks to various years in the past. He is later revealed to be a man in cell phone armour, although he most likely is of inhuman origin because he is capable of performing strange feats of magic - just by dialing numbers on himself, he can get anything he wants (limo, 80's clothes, etc.). He is a large 80's style cell phone with human arms and legs. He can prank anyone at anytime by talking to them on a phone. The Master Prank Caller, as his name suggests, is the master of prank calls.

Master prank caller