A paranormal expert and his daughter bunk in an abandoned house populated by 3 mischievous ghosts and one friendly one.

Casper on Screen: I told you I was a good dancer. Can I keep you?
Kat: Casper?
[Casper sitting on his old sled, takes his baseball cap off]
Casper: I begged and begged my dad to give me this sled, but he acted like I couldn't even have it, because I didn't know how to ride it. But then one morning, I came down for breakfast and there it was, just for me, for no reason at all. I took it out, went sledding all day. And my dad said "that's enough" but I couldn't stop, I was having so much fun It got late, got dark, got cold... and I got sick, and my dad got sad.
Kat: What's it like to die?
Casper: Like... being born, only backwards. I remember, I didn't go where I was supposed to go. I just stayed behind, so my dad wouldn't be lonely.
Casper: There's a girl... on my bed. YES!
Kat: Drop dead.
Stretch: Too late.
Kat: You guys are disgusting, obnoxious creeps!
Stretch, Fatso, Stinkie: [in unison] Thank you!
Kat: I mean, what's your problem? He's just cleaning the floor!
Stretch: Hey, shut up, skinbag!
Kat: Piss off!
Stretch: Take a hike!
Kat: Get a grave!
Amelia Harvey: That was a very noble thing you did tonight, Casper. I know Kat will never forget it. She needs her father. And I know yours won't forget it either. You fulfilled his greatest dream, Casper, and I know he is very, very proud of you. And for what you've done, I'm giving you your dream in return. But it's just for tonight. Sort of a Cinderella deal.
Casper: So I have until midnight?
Amelia Harvey: Ten.
Casper: Hey, Cinderella got until midnight.
Amelia Harvey: Cinderella wasn't twelve years old.
Kat: Sometimes I worry that I'm starting to forget.
Casper: Forget what?
Kat: My mom. Just certain things. The sound of her making breakfast downstairs. The way she'd put on her lipstick, so carefully. I do remember, she always used Ivory soap, and when she'd hug me, I'd breathe her in, so deep. And I remember before I'd go to sleep she'd whisper in my ear, "stardust in the eyes, rosy cheeks, and a happy girl in the morning." Casper?
Casper: Hmm?
Kat: If my mom's a ghost, did she forget about me?
Casper: No. She'd never forget you. Kat?
Kat: [about to sleep] Mm-hmm?
Casper: If I were alive, would you go to the Halloween dance with me?
Kat: Mm-hmm.
Casper: Kat?
Kat: Mm-hmm.
Casper: [whispers] Can I keep you?
Kat: Mm-hmm.
[Casper kisses Kat on the cheek]
Kat: Casper, close the window. It's cold.
[Casper curls up in bed by Kat's side]
Stinkie, Stretch, Fatso: All for one, and one for all!
Stretch: Catch your pants before they fall!
Fatso: On the runway now we have Dr. James Harvey wearing smashing underwear.
Stretch: Marky Mark, he's not!
Dr. Raymond Stantz: [runs out of the house frantic] Who you gonna call? Someone else.
Casper: All I want's a friend.
Carrigan Crittenden: [appears as a ghost to Dibs] Not so fast, little man. The bitch is back!
Amelia Harvey: James, I know you have been searching for me, but there's something you must understand. You and Kat loved me so well when I was alive that I have no unfinished business, please don't let me be yours.
Kat: I can see right through you.
Casper: Yeah, kind of happens when you haven't got any skin.
Father Guido Sarducci: No problem, Piece of cake... piece of CRUMB cake!
Carrigan Crittenden: DIBS! Get this thing cooking, you flaccid little worm you!
Dibs: Ah, Carrigan! How kind of you to drop in!
[Carrigan laughs]
Dibs: You know, if there's one thing I've learned from you, it's 'always kick 'em when they're down'. And baby, you're six feet under. Oh, what a shame!
[grabs vial]
Dibs: Sorry, sweetheart; we're through!
Carrigan Crittenden: [gasps as she sees that Dibs is about to break the vial] I am not gonna forget this, you ungrateful, lousy little worm you!
Dibs: [chuckles sarcastically] You can haunt me all you want, but it's gonna be in a great big expensive house, with lovely purple wallpaper, and great big green carpets, and a little dog, called 'Carrigan' - a bitch, just like you! I've got the power! I've got the treasure!
Carrigan Crittenden: And you have a flight to catch!
Dibs: Huh?
[Carrigan flings Dibs out the window]
Carrigan Crittenden: [turns to Kat and Casper, calmly] Any other takers?
Casper: No, but aren't you forgetting something?
Carrigan Crittenden: What?
Casper: Your unfinished business.
Carrigan Crittenden: My what?
Kat: You know, unfinished business. All ghosts have unfinished business. That's why they don't cross over.
Carrigan Crittenden: Unfinished business? I have no unfinished business. I have my treasure, my mansion. I have EVERYTHING. I'm... just... perfect!
[she laughs evilly until a flash of light comes out of her as a sign that she is crossing over]
Carrigan Crittenden: [gasps] Wait! Wait! I lied! I have unfinished business - lots of unfinished business!
[more flashes of light appear]
Carrigan Crittenden: I-I'm not ready to cross over yet! Wait! You tricked me, you rotten little rats!
[Carrigan screams as the flashes of light causes her to vanish without a trace]
[after seeing a ghost]
Kat: Dad, I'm sorry.
Dr. Harvey: For what?
Kat: For not believing you, for thinking you were a total loser.
Dr. Harvey: Aww honey... apologize later!
Clint Eastwood: [the image of Clint Eastwood appears in the mirror] I'm gonna kill you... your momma... and all her bridge-playing friends.
[face Changes again, this time to Rodney Dangerfield]
Rodney Dangerfield: You think YOU got it tough? I got a facelift! And there's one that looks just like it underneath!
Stinkie: Smell-o-gram!
Stinkie: Scream or sugar?
Dr. Harvey: I thought I had a hundred things to say when I saw you... but - how?
Amelia Harvey: Let's just say you know three crazy ghosts who kept their word.
Casper: [as Arnold Schwarzenegger] Come with me if you want to live.
Casper: God, I'd kill for a pinky.
Stretch: [the door knocks three times slowly] That was fast. I... I believe it's for you, Doc.
[supernatural music plays as light starts to shine in the room. Dr. Harvey starts to answer it but looks back]
Stinkie: [with Stretch] Go.
[Dr. Harvey continues his way to the door. The music intensifies. When he opens the door, light shines in his face and he stares in awe]
Dr. Harvey: Amelia?
[the light and music fade as Fatso reveals himself in a red dress and makeup. He notices Dr. Harvey]
Fatso: MY MAN!
[he pulls him in for a kiss]
Fatso: MMMMMMMM-WAH!
[Dr. Harvey falls to the floor]
Fatso: Hmm.
[Fatso laughs smugly]
Fatso: I feel like Oprah on hiatus.
Stretch: You look like Oprah on hiatus.
[last lines]
Kat: [after everyone has left] Not bad for my first party, huh?
Casper: [friendly] Couldn't have been better.
Dr. Harvey: It ain't over get. BOYS!
[the Ghostly Trio appears and start playing Casper's song]
Carrigan Crittenden: [stalking after Dibs, carrying a huge battle axe] Damn it, Dibs! This won't hurt a bit! Stop bein' such a weenie! It's just business! COME ON!
Stretch, Fatso, Stinkie: [singing] It's my party and I'll die if I want do, die if I want to. You will die too, when it happens to you.
[Dr Harvey pulls at the carpet to stop him rolling down the stairs, it comes away and he rolls down the stairs in the carpet]
Stinkie: Sushi, anyone? California roll, comin' up!
Kat: In two years I have been to nine different schools, eaten in nine cafeterias. I can't even remember anyone's name.
Dr. Harvey: Honey, I think it's time that we sat down and had a little talk.
Kat: It's a little late for that, Dad.
Dr. Harvey: How late?
Kat: Oh, don't worry, not that late.
Dibs: [looking down after Carrigan falls down the cliff] Carrigan! Are you a ghost yet?
[no answer]
Dibs: Carrigan! What a tragic waste. She had my favorite sunglasses.
Stinkie: [the Ghostly Trio along with Dr. Harvey are out partying, and Dr. Harvey is drunk, singing karaoke] Hey, this Dr. Harvey's got a lot of spirit, you know what I'm sayin'?
Stretch: Yeah, but he's got his whole miserable life ahead of him.
Fatso: So we could do him a favor, and put him out of his misery.
Stretch: Yeah. Hey, good idea. We've been The Ghostly Trio long enough. Time to make it a... quartet!
Stretch: [eating breakfast with Stinkie and Fatso] Ya know what the problem is? Casper's got no respect for us.
Fatso: After all we've done for the little glowworm.
Stretch: Yeah. HEY!
[he sees Casper cleaning the mess the trio made on the floor, via their breakfast]
Stretch: What the hell do ya think you're doin', Bulbhead? This floor used to be dirty enough to eat off of.
Casper: But we have company.
Stretch: Oh, yeah? Well, company loves misery.
[he turns into a Nike]
Stretch: BOOM!
[he kicks Casper out of the way and the whole trio laughs and cheers]
[Dr Harvey has died and come back as a ghost]
Dr. Harvey: I'm free! I've never felt so great in my life; I can fly-eee!
[He crashes into the floor]
Fatso: Rookie.
Stretch: Stinkie, work with him.
Fatso: [Dr. Harvey is sucking up all three ghosts in the vacuum] This s... sucks!