| A Trip To St. Elsewhere: The Official Gnarls Barkley St. Elsewhere Mixtape | CDr, Mixed, Album, Partially Unofficial | Not On Label | 2006 |
| Crazy (Hitmixers Remix) | Vinyl, 12", Unofficial Release, Single Sided | Gnarls Barkley (White) | 2006 |
| Crazy (Karl G Remix) | Vinyl, 12", Unofficial Release, Single Sided | Gnarls Barkley (White) | 2006 |
| Crazy | Vinyl, 12" | Downtown Music | 2006 |
| Smiley Faces | Vinyl, 10", Single Sided, Coloured | Warner Music UK Ltd. | 2006 |
| Smiley Faces | CD, Single | Warner Music UK Ltd. | 2006 |
| St. Elsewhere | CD | Warner Music UK Ltd. | 2006 |
| Crazy / Just A Thought | CD, Maxi-Single | WEA International, Inc. | 2006 |
| Crazy | CD, Maxi-Single | Warner Music (Australia) | 2006 |
| Crazy | Vinyl, 10", Single Sided, Promo | Warner Music UK Ltd. | 2006 |
| Crazy (Remixes) | CD, Promo | Warner Bros. Records Inc. | 2006 |
| Smiley Faces | CD, Single, Promo | Warner Music UK Ltd. | 2006 |
| Who Cares? | CD, Single, Promo | Warner Music UK Ltd. | 2006 |
| Crazy | Vinyl, 10", Single Sided, Limited Edition, Coloured | Gnarls Barkley (White) | 2005 |
| Crazy | 10" | Not On Label | 2005 |
| St. Elsewhere | CD, Album | Warner Music UK Ltd. | |
| St. Elsewhere | Vinyl, LP | Warner Music UK Ltd. | |
| Smiley Faces | Vinyl, 12", Single Sided, Etched | Warner Music UK Ltd. | |
| Smiley Faces (CD 1) | CD, Single | Warner Music UK Ltd. | |
| Smiley Faces (CD 2) | CD, Enhanced | Warner Music UK Ltd. | |
| Crazy | CD, Single | Warner Music UK Ltd. | |
| St. Elsewhere | CD, Album | Warner Music (Australia) | |
| Crazy (Spencer Collective Edit) | Vinyl, 12", Unofficial Release, Single Sided | Gnarls Barkley (White) | |
| Crazy | Vinyl, 12", Single Sided, Etched | Warner Music UK Ltd. | |
| Crazy | Vinyl, 7", Picture Disc, Limited Edition | Warner Music UK Ltd. | |
| Crazy | CD, Single, Promo | Warner Music UK Ltd. | |
| Crazy (Malpractice Remix) | Vinyl, 12", Unofficial Release, Single Sided | Malpractice | |
| St. Elsewhere | CD | Downtown Music | |
| St. Elsewhere | Vinyl, LP | Downtown Music | |
| St. Elsewhere | LP | Downtown Music | |
| St. Elsewhere | Unknown | | |
| Who Cares? | Vinyl, 7", Picture Disc | Warner Music UK Ltd. | |
| Crazy | CD, Single | Warner Music UK Ltd. | |
| Crazy (The Funky Mix) | Vinyl, 12", Unofficial Release, Single Sided | Blu Trax (White) | |
| Crazy | Vinyl, 12", Single Sided, Unofficial Release | FU (White) | |
| Crazy | Vinyl, 12", Promo | Downtown Music | |
| Crazy / Go Go Gadget Gospel | CD, Maxi-Single, Promo | Downtown Music | |