It features guest appearances from D12, Young Miles, Big Boi, Devin the Dude, Dion Jenkins, Fatt Father, King Gordy, Obie Trice, Raphael Saadiq, stic.man, Sindee Syringe, and Torrey Holloway.

Hannicap Circus received mixed reviews from music critics who were less than enthusiastic with Bizarre's brand of humor and drama.

[2] AllMusic's David Jeffries praised the album for its beats and lyrical content that were more akin to a better produced Insane Clown Posse, calling it "solid, filthy, fun, and everything else that you'd want from a less nimble Kool Keith".

[3] Steve 'Flash' Juon of RapReviews found Bizarre's brand of demented shock humor entertaining and is complemented with appropriate production and a cast of equally game featured artists, concluding that "for fans of D12 and/or Hunter S. Thompson, Hannicap Circus is one crazy trip through the mind of a lunatic".

[8] Dorian Lynskey of The Guardian said that the album had potential to be a competent horrorcore effort but was weighted down by Bizarre wanting it to be both humorous and dramatic with neither side fully delivering, concluding that "Hannicap Circus is the last thing you'd expect from a fat, shower-cap-wearing, nipple-rubbing son of a bitch: boring".