Mario has decided to finally take responsibility as hero and became a vigilante to protect the Mushroom kingdom from danger

When the MxM family goes to the circus, they meet a new "friend", named Loo Loo the clown. However, Mario doubts this clown is as friendly as he seems. Is Mario worrying over nothing, or is he correct? Let's find out. (This is based on an episode of Ben 10 called last laugh)

Something weird has been going on in the mushroom kingdom. candy for Easter has been disappearing, and more and more bees keep coming to the kingdom. Looks like a job for the Crimson star.

After receiving an emergency alert, Mario suits up and heads to meet a young hero in training, and uncovers a dark secret.

They have fought the titans... They've fought the Red Riot... And, they've fought aliens... But, the defenders biggest challenge... Will be... a vigilante... and how to trust him.

After Mario gets brutalized in his fight with Immortal, the plumber gets agitated, to the point where he decides to do vigilantism his way. Unbeknownst that this would lead to an unexpected change in how they saw one another. Will they be able to build this trust for good? Let's find out.

Mario has been assigned to join the defenders. But, to prove his worthiness, he has to do 3 trials. His first comes with the Goddess of peace, Morgana. But, this also leads to Mario meeting another God. the God of War

After capturing one of Gear Heads' goons, Mario is welcomed into the underwater city of Atlantis by Poseidon. There, he learns of Atlantis' history and of an evil monarch. Dead, but not buried. Can Mario survive Atlantis? Let's find out.

After many disappearances and deaths of people in his hometown of Transylvania, Northwind asks for help from Mario to stop two dangerous and monstrous enemies. Can they save Transylvania? Let's find out.

After a team of supervillains, who he recently locked up, escape, Mario must go after them... While teaching a team of heroes in the making. Can Mario and the junior justice system save the day? Let's find out.