Top row:
MLG Films in association with Mountain Dewritos present a Feature Length film
Jason Ritter

Second row:
"Dipper Delivers: Meme Cop – Good Meme M8"
Jackie Buscarino
Rodger Bumpass
Ogrelord Shrek
Jon Jafari

Third row:
Konkey Dong
Kristen Schaal
Even Memes
and Sean Connery as Don
Casting by Felix Kjellberg

Fourth row:
Choreography by Seth MacFarlane
Special effects: Michael Bay
Music by Johnny Test
Costumes by Scott Cawthon

Fifth row:
Edited by John Enter
Production design: Jay Van Esbroek
Cinematography by Charles Barkley
Co-Producer: Pan Pizza

Sixth row:
Executive producers: Uwe Boll & Tara Strong
Produced by Alex Hirsch, Lauren Faust, Lez Huarez

Bottom row:
Written by Casey Alexander & Zeus Cervas
Directed by JJ Abrams

I just think it's funny to put random and controversial celebrities in the credits, as well as assigning the most ridiculous choice for the job.

What does all this say? I get the feeling there's quite a few jokes in here.