Sharkboy is happy with his wife, Lavagirl, and his 5 year old daughter, Guppy. But there's still something missing in his life... his long-lost father. Sharkboy won't rest until his happiness is fully complete with his beloved father back in his life.

After the Justice League's successful defeat of Darkseid years ago. Their young children now follow in their footsteps. And when they join the team: Young Justice, they learn that being a hero isn’t about their super powers, it's about their character. And they start to understand the 6 Gifts of True Heroism from their parents.

A lonely young unicorn colt named Day Dream, goes on an adventure to save Dimension Drool with Sharkcolt and Lavafilly. Together, they learn that differences are what make everything, and everypony special, and that nothing is more important than friendship. In Dimension Drool and in Equestria.