Most of the super-pets in this film are no super-pets that any DC comic reader would recognize, although they are based on extant characters.
Here is the dramatis personae:
Krypto, an alternate version of the original super-dog.
PB, aka "The Mighty Oink", a pot-bellied pig whose power is super-growth, similar to Colossal Boy. I the inclusion of a pig may be a reference to the time Circe transformed Wonder Woman into pig in Justice League Adventures.
Merton, a turtle possessing super-speed. An unmistakeable reference to Fastback, of the Captain Carrot's Zoo Crew, as well as the Crash, of Earth C-minus, and the original terrapin speedster, The Terrific Whatsit.
Ace, a dog (pit bull?) whose name is a callback to Batman's bat-hound, but is clearly a different character. Possesses super-strength and cartoon invulnerability.
Chip, a squirrel with lightning powers. Not to be confused with Ch'P, Green Lantern of H'Lven.
https://www.youtube.com/watch?v=1jkw2JPCl18&ab_channel=WarnerBros.Pictures