An Old Enemy Returns! Worlds Collide!

'''An Old Enemy Returns! Worlds Collide!' is the first episode of Super Sonic Bros. Super''.

Summary
Goku rushes home from work and puts on his Dogi, and Goten asks if he's going to go training and wants to go, but Chi-Chi forbids it. She tells Goten to train his head, not his body, as there are no more villains around so he has no reason to fight. While Chi-Chi is rambling on about studying, Goku and Goten sneak off. In the sky, Goten tells Goku he's had enough about being forced to study, and he comes up with the idea of getting Vegeta to help them, as he is aware that Vegeta has no fear of her at all. Goten decides to head over to Videl's place to hide out, and Goku heads to Capsule Corp to get Vegeta.

In the Mario universe, Luigi is hanging up some clothes and Mario is relaxing. Suddenly, a figure crashes to the ground. Mario and Luigi recognize it as Parakarry and they check to see if he is okay. Parakarry quickly recovers, and he gives Mario and Luigi a letter from Peach. Parakarry then takes off to deliver more letters as Mario reads the letter, which states that Peach is inviting them to a picnic. Yoshi arrives and he reveals that he was invited too. With that, the three heroes head over to Peach's castle.

Back in the Dragon Ball universe, Goten arrives at Videl's house. Videl answers the door, and she invites Goten inside. Goten then explains to her about his problem, and Videl agrees to help and allows him to stay at her house for a while.

Major Events
Dragon Ball Multiverse

Mario Multiverse
 * Goten enlists the help of Videl and Vegeta to get his mom to let him train
 * Goten reveals that he's been training in secret ever since Buu's defeat whenver he got the chance
 * Goten and Trunks have their rematch from the tournament back in Age 774.
 * Peach invites Mario, Luigi, and Yoshi to a picnic.
 * Bowser, working with Dr. Eggman, kidnaps Princess Peach
 * Sonic and his friends meet Mario, Luigi, and Yoshi and team up with them

Battles

 * Goten VS Trunks

Trivia

 * The very first scene of the episode is based off of Dragon Ball Super episode 77, but afterwards the episode takes a completely different turn.
 * Thanks to the events of the Mario and Sonic Olympic Games, Mario and Sonic already know each other.