Surrealist Sins is the second stage in Grotesque Gallery.
If you have Cat Machine Mk III then you will only need that and Awakened Bahamut. Chuck in a couple of manic lions to finish the stage faster.
Uberless lineups (Freeze cannon required)
- Crazed Cat, Mohawk Cat, Crazed Wall Cat, Maglev Cat, Crazed Fish Cat, Crazed Titan Cat, Jamiera Cat, Awakened Bahamut and Legendary Musashi.
- Spam lil' lion, lion, manic lion, and any high Dps cat (Uber optional)
Demonstrated video: 
Octopus Cat Strategy
- Any money up and defense up combo, Manic Eraser, Octopus Cat, Butterfly Cat, Maglev Cat, Awakened Bahamut
Send out Manic Eraser to trigger base shockwave , and send Swimmer, Maglev and Octopus after the wave passes. Keep spawning these three until you've enough money to send Bahamut.
- This level has the second most magnified assassin bear in the game, beaten by Veggie Friends