Bonnie is an male animatronic, even though his name is feminine. This has caused many debates about Bonnie's true gender.
The 'OMG! JUSTIN BIEBEEEEEEEEEEERRRRRRRRR!' line Bonnie has is from a YouTube video called "How to Make Five Nights at Freddy's not Scary" (by Garrett Williamson).
Though it might seem like Chica only cares about pizza, but all of the animatronics do, since Bonnie screamed that someone removed "all the frickin' pizza", and everyone, including Dr. Eggman, screamed.
He seems to be the nicest of all the animatronics towards Mario, not counting Golden Freddy who crashes Project 64 on Mario. Bonnie only yells "F**K YOU!" at Mario when he tells him to leave him alone.
Like other animatronic in R64: Return to Freddy's Spaghettria, he has suffered damage from Mario's rampage, he has lost an arm, a hand and his upper face. He has also seems to have gone insane as well.
His insanity is shown through him shouting out nursery rhyme titles most of the time in Retarded64: Return to Freddy’s Spaghettiria
Bonnie might be gay, as he is clearly a fan of Justin Bieber.
While Bonnie never had a phantom in FNAF 3, he does have one in Revenge of Freddy's Spaghettiria.