A boy and his beloved imaginary friend are able to stay together at an orphanage of sorts for imaginary friends that children have outgrown to be adopted by new children.

[repeated line]
Cheese: I like chocolate milk!
[Talking about Mr. Herriman]
Frances "Frankie" Foster: I'll never understand why my sweet, lovable grandmother imagined that stingy stick-in-the-mud!
Blooregard "Bloo" Q. Kazoo: Mac's in trouble! Mac's in trouble! You are in trouble!
Mac: You know, you're in trouble, too.
Blooregard "Bloo" Q. Kazoo: I'm always in trouble!
Blooregard "Bloo" Q. Kazoo: Atta boy, Mac! Down with tyranny! Up with... nontyranny!
Mac: [after a night in prison] Man, what a crazy night.
Blooregard "Bloo" Q. Kazoo: Eh, I've had worse. Nice seeing ya again, Charlie. Say hi to the kids for me.
Guard: Will do, Bloo.
Frances "Frankie" Foster: I sowwy Mr. Hewwiman. I've been a bad girl.
Mr. Herriman: Trust me when I tell you that we did not order a dozen pizzas.
Pizza Delivery Man: Okay. Here's your pizzas, man.
Mr. Herriman: I reiterate: We did not order any pizzas. And furthermore, I am not a man. I am a rabbit.
Pizza Delivery Man: Okay. Here's your pizzas, rabbit.
Cheese: [with aluminum foil in his teeth] I have braces.
Mac: You found that on the ground, didn't you?
Cheese: Garbage can.
Mr. Herriman: [to Bloo] I dislike you with a great intensity.
Madame Foster: I told you explicitly, implicitly and unequivocally, no wild parties!
[beat]
Madame Foster: ... Without me! You know how much I love wild parties.
Frances "Frankie" Foster: Shut up, shut up, shut up! Oh my gosh, oh my gosh!
Blooregard "Bloo" Q. Kazoo: Rip-off artist!
Blooregard "Bloo" Q. Kazoo: [to Mac] See! He's screwing everything up!
Cheese: Nu-uh! I'm only screwing the wheel!
Blooregard "Bloo" Q. Kazoo: Secret door, secret door, secret door, secret door, secret door, secret door!
Blooregard "Bloo" Q. Kazoo: Oh, thank you, helpful trail of clothes. I love you.
Blooregard "Bloo" Q. Kazoo: [Bloo becames angry at the Duchess and rushes her] That's it!
Mac: Bloo! No!
[runs after Bloo and stops him, but the Duchess opens up a trap door under them]
Blooregard "Bloo" Q. Kazoo: Trap door?
Mac: Yep.
Blooregard "Bloo" Q. Kazoo: I hate this house!
Eduardo: Donde esta el pollo loco?
Wilt: I don't know where that crazy chicken went.
Frances "Frankie" Foster: [narrating] Foster's Home For Imaginary Friends is a wonderful, funderful imagination habitation. We provide food, shelter and a warm heart for imaginary friends looking for a place to call *home*. So if you know of or have an imaginary friend that desperately needs a home, then come on down to Foster's Home For Imaginary Friends, where good ideas are not forgotten.
Wilt: Hey, how ya doing? Name's Wilt.
[Mac and Bloo stare up at Wilt for a long time]
Wilt: Yo, guys! Hello? Oh, I get it. Is cool, is cool. I know I'm all broken, with the wonky eye and the stubby arm. Probably freaks you out, huh? Don't worry, I'll get someone else...
Mac, Blooregard "Bloo" Q. Kazoo: You're tall!
Wilt: Oh, well, yeah.
Blooregard "Bloo" Q. Kazoo: You should play basketball.
Wilt: Oh, well, actually I used to... sure. So, how about that tour?
Blooregard "Bloo" Q. Kazoo: Got B.O.? Get DEO!
[while attempting to use a vacuum cleaner to capture a ghostly-seeming Bloo]
Wilt: No, Ed, no! Not blowing! The other way! The other way!
Eduardo: Other way?
[flips switch]
Wilt: Yeah, yeah! That's really sucking!
Eduardo: [sighs] There's no pleasing him.
Duchess: And to what do I owe the unwelcomed intrusion of Bloo and boy?
Mac: Please, your Duchessness. I'm late, Bloo's hungry, and we're lost. Can you tell us how to get downstairs?
Duchess: Yes.
Blooregard "Bloo" Q. Kazoo: Cool.
[Duchess resumes eating]
Mac: Um... hello?
Duchess: What?
Blooregard "Bloo" Q. Kazoo: Aren't you gonna show us the way down?
Duchess: No.
Mac: But you said...
Duchess: You asked if I could, and I can. You didn't ask if I would, and I won't.
Blooregard "Bloo" Q. Kazoo: Why I oughta... and I will!
Blooregard "Bloo" Q. Kazoo: See, I told you they'd go for it.
Mac: No you didn't. It was my idea.
Blooregard "Bloo" Q. Kazoo: But I inspired it with my...
Mac: Selfishness?
Blooregard "Bloo" Q. Kazoo: Self*less*ness.
Rubber Chicken: I've heard of mobile phones, but this is ridiculous.
Blooregard "Bloo" Q. Kazoo: [Bloo runs up] Hey, have you seen a mo...
Rubber Chicken: I already made the joke, son. He went thatta way.
Blooregard "Bloo" Q. Kazoo: Oh, it's you, Heather...
Berry: BERRY! MY NAME IS BERRY!
Blooregard "Bloo" Q. Kazoo: I dunno, you look like a Heather to me.
Goo: [slaps Mac's butt] Now *you're* the wildebeest!
[Talking about calling in help to catch a "ghost"]
Wilt: Who are you gonna call?
Coco: Co-coco!
Wilt: They've been out of business for years.
[repeated line]
Wilt: I'm sorry, but...
Maid: My scribble scrubs screens.
Kid: My scribble scrubs scooters!
Man: My scrubble scribs - I mean, my scrib scrububbles, I mean...
[sighs]
Man: mine does stuff, too.
Mac: You gu-uys!
Mac: Bloo, you'd better stay away from that secret door. You're going to get in trouble.
Blooregard "Bloo" Q. Kazoo: Pfft! Secret doors, who needs 'em? What do I care about secret doors?... and the unparalleled delights they keep hidden from the world!
Mac: [slaps Bloo] Let go, man!
Blooregard "Bloo" Q. Kazoo: Right, right. It won't happen again.
Mac: I hope not.
Blooregard "Bloo" Q. Kazoo: I've got it all under control.
Mac: You'd better.
Blooregard "Bloo" Q. Kazoo: No worries. It's the last thing on my mind. Here, let me get that secret door for you, Mac.
Mac: Bloo!
Mac: Secret later, Mac!
Frances "Frankie" Foster: Hi, I'm a stupid, lazy door. I'm so stupid and lazy, I won't even OPEN UP!
Mac: [trying to teach Bloo how to be sarcastic] Now you try.
Blooregard "Bloo" Q. Kazoo: I want a cooookie.
Mac: [pause] Wait. Are you being sarcastic?
Blooregard "Bloo" Q. Kazoo: I'm being huuuungry.
Blooregard "Bloo" Q. Kazoo: I'm sorry Mac
Mac: It's okay Bloo, I
Blooregard "Bloo" Q. Kazoo: No, it's not okay, I was selfish and dumb and I took you for granted, and it's almost got you
[quickly changes the subject]
Blooregard "Bloo" Q. Kazoo: [happily] Paddleball!
Mac: Are you being sarcastic?
Blooregard "Bloo" Q. Kazoo: Man, I don't even know any more.
Blooregard "Bloo" Q. Kazoo: [Berry is driving a train to ram into Mac] That pink whatchamacallit is trying to kill you!
[Bloo is trying to break up Frankie's date with Dylan by posing as her ex-boyfriend]
Blooregard "Bloo" Q. Kazoo: Why, Frankie! Fancy meeting you here! How long has it been?
Frances "Frankie" Foster: [spits out her drink] Bloo?
Blooregard "Bloo" Q. Kazoo: Why, Frankie, you old girl! I can't believe you still call me that... term of endearment!
[Dylan raises an eyebrow, blinks twice]
Frances "Frankie" Foster: [to Dylan] Heh-heh, heh-heh, uh... don't listen to this maniac!
[to Bloo]
Frances "Frankie" Foster: What are you doing here, Bloo?
Blooregard "Bloo" Q. Kazoo: Why, I'm on a dinner date! And please, call me by my first name - Orlando!
Cheese: Can I have some fishy crackers?
Blooregard "Bloo" Q. Kazoo: That's strange. I know I dropped a pair of tighty whities right here.
Mac: Are you sure?
Blooregard "Bloo" Q. Kazoo: Trust me, handling someone else's drawers is something you never forget.
[talking about how to get down from the roof]
Mac: But how? A ladder? Man, this is tough.
Blooregard "Bloo" Q. Kazoo: No, sheets!
Mac: [shouts] Bloo!
Blooregard "Bloo" Q. Kazoo: No, no! Sheets! Bed sheets!
Eduardo: Potatoes, potatoes, potatoes, potatoes / Everybody likes potatoes.
[others look shocked by this]
Eduardo: This spud's for you.
[repeated line]
Terrence: This'll only hurt for a second!
Berry: [being tied to a giant rubber band ball for the second time] Why does this keep happening to me?
Blooregard "Bloo" Q. Kazoo: Except the mice. Mice like Cheese.
Cheese: [looking down at the mice] Hi doggies.
Cheese: I'm a cowboy
Blooregard "Bloo" Q. Kazoo: You don't look so good.
Blooregard's Reflection: Well, you're no prize either!