Hack is a six-limbed alien with pink skin and lime green hair on his head and across his back. He has several eyes scattered across his body. He has a chubby appearance much like that of a frog. Hack has bright purple claws on his legs. He wears a black, green, and white wrist brace on his middle, right appendage.
His Omnitrix symbol is located on the right wrist brace.
The symbiotic Slash is a thin, worm-like alien with light brown, bony skin. He has sharp spikes across the side of his body and four sharp teeth on his face, with bright purple mandibles. He has two eyes on the side of his face behind his mandibles. He wears a black and green uniform on his head.
His Omnitrix symbol is located on the top of his head.
- Symbiotic Being- Hack N' Slash is made up of two living beings, Hack the host and Slash the parasite.
- Sharpness and Agility- Slash is very sharp and agile.
- Poison- Hack can generate poison clouds.
- In Chapter 8: Risen (Page 40-41), Hack N' Slash is used to get Kevin away from Smash Mouth, who he then cuts in half using Slash's sharp body.
- Chapter 8: Risen (first appearance)
- Hack N' Slash was the second-place winner of Ink Tank's Alien Contest.
- Hack N' Slash are two different life-forms but count as one transformation.