Here is how Ariel and Eric explained about Melody's disappearance in Genesis Park III.
Princess Yuna: Time for you to explain, Eric.
Prince Eric: Alright, Melody is out there on this island with Max Goof, John Smith and Cassim.
Ariel: It's been too long since they've disappeared.
Princess Skyla: No wonder you asked us to guide you here, You needed our help to rescue Melody.
Britney Sweet: Didn't see it coming.
Human Twilight Sparkle: My friends and I've never been on this island.
Princess Yuna: That was when my friends and I got lost in. This is Pangea, Where the treasure that our folks found a long time ago, the home of the Tribal Penguins, The only Habitat of the Dinosaurs and other Extinct Animals.
Human Twilight Sparkle: Must have been quite an adventure.
Human Rarity: (looked at her boots and had gone muddy) My boots look awful.
Moon Shoes: (brings out a shoe polisher)
Princess Yuna: Come on, Let's go.
At the plane wreck, Yuna and the others searched for some materials.
Princess Yuna: There's landing gears in the plane, they must but knocked out of it.
Princess Skyla: There's wings, They fell off after crashing, The windows are badly broken. And there's engines and propellers, They should be put into some good use somehow.
Human Rainbow Dash: We'll have to work on them.
Nyx: Look! It's a video camera!
Princess Yuna: The batteries are running low, I'll take care of it. (use her magic to make a permanent power source)
Melody: (on camera) I'm ready to get down, Max!
Max Goof: (on camera) Alright, One.... Two..... Three! (uncoupled Melody's safety gear) Okey, Here I come!
Melody: (on camera) Alright, Max! Come on! Let's meet up with Cassim and John!
The camera shows Melody, Max, John Smith and Cassim finding a safe area.
Max Goofy: (on camera) The camera is still on!
Melody: (on camera) We'll be safe here. Let's stop here for a few nights.
Max Goof: (on camera) Good idea.
The camera turns off.
Ariel: Melody's out there, I hope she's okay.
Goofy: (in Yuna's mind) Max has been gone with Melody, Cassim and John Smith for a really long time. I hope he's okay.
Princess Yuna: I'll help you find Melody. We're going to find Max as well.
The group took the parasail down. They found Max's cap, It Yuna noticing that Max and Melody were here.