Gravity Falls VS the Forces of Evil (Crossover Fan Fic)

In the sleepy town of Oregon, it's going to get a little weirder, it's going to get a little wilder. When two teens arrive out of the portal, Stan's plan is ruined. As Mabel and Dipper get to know their new guests, they discover their names are Star Butterfly and Marco Diaz. Dipper, being the monster hunter he is, so...

Time Travel

While the day is boring and full of rain, Marco comes up with an idea to test Star's wand to see if it can make them to travel back in time to relieve the epic boredom. Will Marco and Star be able to do the unthinkable and impossible? Will something blossom between them? This is also my first one-shot so bear with me...