|“||I tattooed your face on my neck!||”|
|— Mack to Twelve, Pilot Episode|
Very Strong,but tends to use his muscles for good.
Has self control, but later loses it when Big Deal and The Butt Witch cause him and Beefhouse to go nuts in Mack and Beefhouse Forever.
Beefhouse is Mack's boyfriend.
- Twelve Mack is a big fan of Reggie since he tattooed her face on his neck and gave her and Todd a big hug when they met in Birthday Forever.
- Upon returning of Twelve on Party Island in Pilot episode, Mack shows her a tattoo on his neck.
- He and Beefhouse become the first LGBTQ+ characters when they kiss each other by the end of Mack and Beefhouse Forever.
- Click here to view image gallery of Mack.