Gasis a stinky cat that has a powerful stench that can make you gag and faint for a second until you recover for some fresh air. He was first introduced in Gas, the Stinky Cat.
Gas' fur is brown with dirty spots all over and his eye color is chocolate brown. He wears a black vest, a red and white polka dot bowtie, a black bowler hat on his head, and like Blister, his whiskers are crooked.
- The reason why he doesn't like having baths was because of a horrible past that involved him losing his brothers during a scene of being chased by a cat catcher and then falling into a river, only to be saved by a bag of stinky trash.
- However, in Snobine, the Snobbish Cat, he did take a bath once to impress Snobine.
- He is in love with a female cat named Snobine.
- In 44 Cats - The Musical, he can use his scent to change colors into green as he used it on Fleur's flowers to turn them green.