Dragons from Another Planet

Dragons from Another Planet is an American animated science fiction action-comedy television series created by Dana Terrace. The show takes place in a world where humans are forced to coexist with dragons from a parallel universe.

Plot
20 years ago, a mad scientist created a device that opens a portal between Earth and a parallel universe, which also brings an alien dragon that went on a rampage, attacking any major city in the world until an organization called Knights of Earth to defeat and send the creature back to her world. However, the dragon had laid some eggs across the entire planet.