The Fairly OddParents (2001)

S1E3 Spaced Out

As Timmy enjoys an episode of Crash Nebula, he makes a wish for an alien companion. In response, Cosmo and Wanda bring to life a genuine alien prince named Mark. However, Mark's parents are outraged and head to Earth with plans to destroy it. Meanwhile, Mark unexpectedly falls for Vicky, leaving Timmy unable to wish him away, since fairy godparents can’t meddle with true love. Desperate, Timmy approaches Mark's parents, asking them to convince their son to move on from Vicky. To succeed, Timmy must prove himself by facing their most challenging tests. Can he resolve the chaos and protect Earth?