Disclaimer: I do not own Dragon Ball Z, or Naruto. They are owned by Akira Toriyama and Masashi Kishimoto respectively. I do not claim to own anything in this story.
Out of the two television show presenters, the white-haired ninja coughed, forcing attention from both the production crew and viewers to him. "Hello, everyone. Piccolo and I are back for another episode of Piccolo and Kakashi on Theories. Today, we are celebrating a special day that passed three days ago," Kakashi Hatake greeted, introducing the contents of the episode.
"On June 23rd 2016, it was the twenty-fifth anniversary of the Sonic the Hedgehog franchise," Piccolo added. "The first game in that series was released on that day in 1991 and has spawned many sequels while even producing other sorts of media, such as comic books and television shows. Unfortunately, we were unable to release an episode three days ago, so we had to settle for today."
"Right. We have talked about the Sonic series before but then, it was only about the game 'Sonic Unleashed'," continued Kakashi. "Three years after the release of that particular game, Sonic Generations was released to celebrate the twentieth anniversary. It was a fantastic game - even critics enjoyed it. However, the ending to its story presents a problem. If you have yet to play Generations, you may wish to skip this episode though the game's story is not exactly the deepest."
Both Namekian and ninja paused momentarily.
"At the game's ending, after both Sonics defeated the Time Eater creature, the two Doctor Eggmen were plunged into the white void with no visible exit. Later in Sonic Lost World, we find that Eggman somehow escaped that area, so they must have found an exit. Since this seems to be true, we have ourselves an interesting plot point," Piccolo explained in slight detail.
"If the classic Eggman - or Doctor Robotnik - knows of the failures of his future self's plans, then why would he bother doing them?" Kakashi rhetorically asked. "Most likely, he wouldn't. This would then create a brand new timeline, where Robotnik tries out plans that his other self never thought of. The modern Eggman looked like he experienced the events of the main series of games, leaving only the spin off games. Robotnik, after knowing Eggman's plans ended in failure, would likely set into motion the events of the spin offs. This includes the likes of Sonic Chaos, Triple Trouble and others. So, a new timeline is born."
"And that must be how the events of those spin offs take place. Of course, this is speculation. If he wanted to, Robotnik could have taken that teaching degree he mentioned, which would basically cancel out the franchise since no evil plans would be happening," Piccolo carried on.
Kakashi cut in, though Piccolo did not seem to mind. "The main timeline would not be affected and would go on as usual, what with Sonic Lost World and whatever the next main series release is. To summarise, the events of Sonic Generations could have created a new timeline that involves the stories of the spin offs."
"That was a rather short episode. Can we not shoehorn in a fight to extend the length a little?" Piccolo questioned.
"No," Kakashi answered, shaking his head. "Our viewers would have likely changed channel at this point in time. Anyway, that is all from us. We will see you next episode."