Sound Ideas, DINOSAUR, ROAR - LOW ROAR 03

This sound effect can be found on the Monsters and Creatures Sound Effects Library, which was made by Sound Ideas.

Clean, Full Length and Unedited Link to the Sound Effect

Johnny Test (2021)
Littlest Pet Shop (2012) (Used once for Pennylingasaurus when she roars at the T-Rex in "A Day at the Museum", during the song "Dino-Pets", twice for Wiggles McSunbask when he roars in "Alligators and Handbags" and once for Penny Ling when she roars at Sunil in "Super Sunil".)
Miraculous: Tales of Ladybug & Cat Noir (Heard in "Animan"; Used once for the titular villian transformed into a T-Rex.)
Pink Panther and Pals (Heard once in "Pick a Caardvark".)