- His first appearance is in "Pups Save a Pool Day", when Marshall shows a comic of him.
- Apollo is often rescuing rabbits.
- He appears for first time on TV in "Pups Save a Super Pup".
- Apollo has the ability to fly and to breathe strong winds.
- He also has super strength.
- Apollo appears to be a Bull Terrier.
- His name is a reference to Krypto the Superdog.
- Apollo seems to be clashing with not just the Spider King, but possibly with Kassandra the Cruelest Kitten.
- His voice actor in "Pups Save Apollo" (Lyon Smith) was not credited. It's currently unknown why.
- Apollo has his own badge and vehicle, but only in toy form.
- Rubble idolizes him.