I can see this working if it's done carefully and planned well. For the most part I'd limit other solar systems to being curiosities or resources - I generally build solar systems for the heck of it while keeping them moderately realistic, and I might do that for this RP just to at least make the universe feel...full. I would love to use one of my solar systems that I already built though... Well, planet, and sun. The other planets aren't really there currently but XD Always room for expansion!

As for technology, well, having them be on different planets would easily explain that issue. Alternatively, the planet itself could be highly segregated on sides, or perhaps the civilians on the moon developed differently from the planet. There are a ton of possibilities to go with this :3

Pokemon, we can do with or without. Inb4Digimon. He he. I'm not helpful here but people have already have four pages to throw ideas XD I must say the Wreck-It-Ralph idea is pretty neat, too, and I do think at least two teams should be present, but more would be a bonus.