This is how Our Heroes came to the Fantastic Beasts and Where to Find Them World and bring Dipper, Mabel and the Others Home in Weekenders Adventures of LEGO Dimensions.

[The Portal and a Shooting Star has comes out and it landed to the Ground and it revealed that Our Heroes is a Shooting Star after they have been send here from the Star Shard]

Emmet: Whoa, what just happened?

Tino: We have been send to this Dimensions, thanks to that Star Shard that Fuyunyan had.

Laval: Why would that Floating Cat had that Star Shard?

Tino: I don't know. I guess he took from Yen Sid.

Batman: Now where are we?

Gandalf: We could ask someone.

(A Man with a Suitcase bumps into them, and it is revealed to be Newt Scamander)

Newt Scamander: Dreadfully sorry about that.

Tino: It's Ok.... Huh? Who are you?

Newt Scamander: I'm Newt Scamander.

Harry Potter: Are you a wizard?

Newt Scamander: Of course, and who might you be?

Harry: Harry Potter.

Newt Scamander: Pleasure to meet you.

Harry Potter: You too.

Sunset Shimmer: So what are you doing?

Newt Scamander: I was looking for my pets.

Doraemon: Who?

Newt Scamander: Just some. I did have some beasts.

Emmet: (in the 9th Doctor's Voice) Fantastic!

Owen Grady: And what's in the Suitcase?

Newt Scamander: Oh, there's alot of Creatures that I put on my travels.

Gandalf: Goodness. I didn't know that.

Newt Scamander: Anyway, can you help me?

Carver: For what?

Newt Scamander: To save New York from all those Portals. Look around!

They saw every bad guys destroyed New York

Newt Scamander: Those Portals has released all the Creature that I don't know about, even though it took Tina's Wand. Look!

They saw them steal item and throw them to the Portal

Newt Scamander: And I have to get it back from them! Even though, I have to Rescue them too.

They saw them taking Dipper, Mabel and their Friends away to the Building

Dipper: Help us!

Mabel: They are taking us to the Building!

Newt Scamander: They were from another Dimension and they need my help from them. We have to save the City or else they're take over New York.

Tino: Okay, let's do it!

They went for to save the City even Dipper and his friends

Tino: We have hurry and save the City!

They are fighting many Bad Guys and they went off to save Dipper and their Friends and it was Hades

Emmet: Hades.

Hades: The Special and he got some Allies. How Cute.

Tino: Are you the one who causing New York into Chaos?

Hades: Bingo!

Newt Scamander: And where's Tina's Wand?

Hades: Right in my Hand.

He throw it to the Portal

Bad Cop: What are you doing?

Hades: Giving this to Vortech. Bye.

He's gonna a leave

Hades: Oh, and one more thing. Save them because I'm drowning them.

Then the Cage is going down with Dipper and his friends

Ford: Help!

Stan: We're gonna drown!

Soos: Hurry!

Tino: We have to save them!

They are gonna save them, but they don't know which button was to stop

Laval: Maybe this Button.

He press the Button and it release the Sharks and they look hungry for Dipper and his friends

Dipper: Wrong button!

Tino: Sorry!

He press the Button and the Water look electrified

Ford: Stop shocking us!

Tino: My bad!

He press another Button and it release all the Piranha and they all look Hungry too

Stan: Not that one!

Tino: Oops!

He press the Button and it release the Snakes

Bad Cop: Snakes. Why does it have to be snakes.

Tino: Which button should I choose?!

Then Doraemon press the Button and Cage has stop

Tino: Whoa, how did you do that?

Doraemon: Well, because that button say off.

Tino: That will work.

They get them off

Dipper: Phew, thanks for saving us.

Batman: No problem. let's take you home.

X-PO has opened a Portal for Dipper and his friends to Gravity Falls and they went back home

Tino: Alright, let's go.

Batman: Except for me, my leg is broken for running.

Tino: Let us help ya, Batman.

They carried him and take him to the Portal and our Heroes went to another Portal