Here is how Princess Yuna and her friends go to the Monster Zoo in Welcome to HorrorLand.
Meanwhile at the Golden Oak Library, Princess Luna couldn't stop thinking about Yuna and her friends.
Princess Luna: I couldn't stop thinking about Yuna now.
Princess Celestia: Relax, Little Sister. At least they're having fun until they're ready to return in time for the ceremony this year.
Prince Isamu: (crying)
Prince Indy and Princess Anna: (crying)
Princess Luna: Alright, we're coming.
Princess Celestia: (comforting her twins) Shh. There, there, Babies, Mommy's here.
Princess Luna: (comforting Isamu) It's okay, Isamu. Shh. Mama's here.
Back with the other heroes, they begin to find Yuna and her friends.
Swifty: (driving his truck) Is everyone ready?
Princess Bubblegum: Ready.
Fizzlepop Berrytwist: I hope they're okay.
Marceline Abadeer: You and me both, Fizz.
Finn the Human: It's rescue time!
And so, they took off in hopes to find Yuna and her friends.
Elsewhere at HorrorLand, the Haunted Car stopped at the entrance of the Monster Zoo and ejected Princess Yuna and her friends out from the back causing them to land on top of each other.
Princess Yuna: Whoa, What a ride!
Apple Bloom (Human): Golly, I've never been in that car before!
Mabel Pines: I'll say, Apple Bloom, but I don't remember having duck feet.
Louie: That's because you're on me, Mabel.
Mabel Pines: Oops. Sorry, Louie.
Robotgirl: (feeling carsick) I don't feel good!
Tommy Turnbull: I sure hope we’d get out of this creepy place.
Yona (Human): Yona too.
As the trunk opens, Yuna and her friends get their belongings back.
Honker Muddlefoot: Yuna, don't you think we should be heading back for the ceremony?
Princess Yuna: I hope so, Honker, but this place must've had a mind of their own.
Suddenly, a flock of Vampire Parrots fly over the group's head.
Sheen Estevez: Whoa, check out those neat birds.
Dipper Pines: Sheen, I don't think these are ordinary parrots.
Then, Fifi and a pair of fur-covered snakes came out from behind growling and hissing at Yuna and her friends.
Hogarth Hughes: Uh, Guys? They're all around us!
Fifi: (barks)
Dipper Pines: Stay, stay. Good girl.
Gus Turner: We're dead sitting ducks.
Gideon Gleeful: Nice doggie, take it easy.
Chloe Park: Let’s just back away slowly.
Fifi: (growls)
Scrappy-Doo: I ain't scared of you, Fifi! Lemme at her! Lemme at her!
Vanellope von Schweetz: No, Scrappy!
Then, the Beast from Goosebumps grabbed Scrappy-Doo and tossed him to the Egyptian area.
Prince Joshua: Scrappy!
Robotboy: Time to panic!
Josephine: I’m with you on that!
Dipper Pines: Quick, let's get out of here!
Honker Muddlefoot: Right behind you, Dipper!
Sweetie Belle (Human): Run!
Portal Glow: I want my mommy!
Nyx: We’d can’t! Because we’re trapped here!
Just as they run for their lives, the song "It's Terror Time Again" begins.
You hear the screeching of an owl,
You hear the wind begin to howl,
You know there's zombies on the prowl,
And it's terror time again.
They've got you running though the night,
It's terror time again.
And you just might die of fright,
It's a terrifying time.
You hear the beating of your heart,
You know the screaming's gonna start,
Here comes the really scary part,
'Cause it's terror time again.
They've got you running through the night,
It's terror time again.
Oh, you just might die of fright,
It's a terrifying time.
All the trees begin to moan,
And the monsters grunt and groan,
Rotting faces full of slime,
Don't you know it's terror time?
And it's terror time again,
They've got you running through the night,
Yes, it's terror time again.
Oh, you just might die of fright,
It's a terrifying time!
After the song, Yuna and her friends ran to the Egyptian section of HorrorLand.