Counterfeit Cat

Gark, a naive 9-year-old alien, believes that Max, a house cat, must train him to save the universe.
Bin Juice; Where Do All the Cat Toys Go?
S1 E1

Max and Gark are stuck together and form a pop band; Max loses his favorite cat toy.

Wormhole; Catnipped
S1 E5

Gark's brand new wormhole arrives in the space mail; Max grows very attached to a cat toy that's stuffed with cat nip.

Hang In There; Wart Attack
S1 E6

When Betty hangs a cat poster, Max gets jealous; Gark finds out that the infamous Zaxos is hiding on Earth.

Vet; No Pranks Thanks
S1 E9

Max pranks Gark; Max chokes on one of Gark's alien cat treats.

Flea Bag; Humanoid
S1 E10

Max has a secret date lined up for Valentine's Day; Gark convinces Max that they should find a boyfriend for Betty.

Staring Dog; 28 Seconds Later
S1 E11

Staring Dog comes to stay in the apartment while Wilma is away; Gark gets sick after eating a hot dog that was on the ground.