Listen Closely: In the episode, "Fear and Loathing in Endsville," when Grim was being stabbed by the scorpion, listen to the way Grim yells. In the episode, "Dumb-Dumbs and Dragons," when the episode starts he yells the same exact way while Hoss Delgado was punching him.
As Billy, Mandy and Grim emerge from the portal to enter the medieval world they pass a tree with a poster with a face that looks like Billy's saying: "WANTED: EVLE WIZARD".
After Grim and Dracula argue, Grim is walking and the sand person comes up. Listen carefully because he says raggle-fraggle- that is what Harold disguised as the sasquatch says in the episode Here Thar Be Dwarves!
Dracula: Look! Dracula sees a limo.
Grim: That's a cactus.
Dracula: You can't tell Dracula what is and what ain't a limo!!
Grim: Fine, go get the limo.
Dracula: (sitting on cactus) This limo hurt Dracula's butt!
(Grim walks into the house)
Billy: Hey, Grim! How was your...
Grim: I don't want to talk about it.
Mandy: We have a job for you.
Boss: (wearing a helmet) Yeah?
Mandy: We want you to change this pathetic idiot of a boy (Billy appears on the screen hitting himself on the head with a hammer) into a pathetic dragon slayer.
Boss: I have a strict policy- I don't work with idiots.
Mandy: Okay. I'll cut you a deal. You train Billy to last one minute against a dragon and you can beat the snot out of Grim anytime you want.
Boss: Alright. (takes off helmet)
Billy: Whoa, Mandy, that looks like...
Mandy: Don't remind me.
Singer: Through miles of sand and bleached white dirt
They shambled on 'til their ankles hurt.
The buzzards sailed high overhead
Ridin' on currents of thick, hot dread.
And the sun burned their hearts like an angry woman,
It scorched their souls like an angry woman,
Oh, like an angry woman.
Then from the west blew a breeze of luck
Eighteen wheels on a big black truck.
An angel of mercy what was wrapped in steel
With an unwashed man stinkin' up behind the wheel.
The road stretched on like an angry woman,
And the cab smelled like french fries like an angry woman,
Phew. An angry woman.
What's that smell?
The sun dropped low down in the sky
Like a pair of pants on an urban guy.
Their stomachs cried out with a rumbling roar
Till they just purt' near couldn't walk no more.
They tried to eat a cactus like an angry woman,
And scorpions chased them down like an angry woman,
...an angry woman.
He drove fast
He drove far
He busted them dunes in his big ol' car.
The buzzards fled at the sight of him
The sight of the one that they call Grim.
They went over the speed limit like an angry woman,
And they caused property damage like an angry woman,
Just like an angry woman.
Grim: Aagh! A sand bandit!
Orc: Actually, we prefer "people of sand".
Grim: (after being stung by the giant scorpion) Dracula...Dracula... Hurry, I'm in terrible pain. You gotta suck out the poison!
Dracula: Nuh-uh, Dracula don't suck.
Grim: You're a vampire! Vampires suck... Blood!
Dracula: Nah, see that's a myth. Dracula scrape with his fangs and lick up the blood. Like this... (demonstrating) See, scrape and lick! Scrape and lick!
TV Contestant: I'll take Cancelled TV Hood for 300, Alex.
TV Announcer: This show starred a bear with an evil brain attached. (no reply) Oh, c'mon, surely somebody has seen that show!
Billy: (admiring Hoss Delgado) Yeah, he's a true hero
Grim: Bah, he's no hero. That term has been so twisted that nobody even knows what it means anymore.
Irwin: Hey, Billy! Guess what, yo? My mom says it's safe for you to sleep over now! I'm over my special problem, yo!
Billy: You're a hero!
Harold: (grunts) I just ate 12 pizzas without throwing up!
Billy: You're a hero!
Skarr: I just popped a huge puss-filled pimple on my back!
Billy: You're a hero!
Mandy: Ordinary morality is for ordinary people.
Dracula: Ahh, that was some mighty fine fried fish!
Grim: Yes it was, Dracula. Yes it was.
Waitress: Your check, gentlemen.
Dracula: Thank you, baby.
Grim: How much do I owe?
Dracula: Oh no no no, this one on Dracula.
Grim: Thanks Dracula.
Dracula: Dracula paying up front so we can get going.
Grim: What a swell guy.
Dracula: (sneaks away from Grim)
(at Billy's house)
Billy: Hey Grim, how was -
Grim: I don't wanna talk about it...
Boss: (at a Chinese take-out) Egg rolls! Half off today only! Half off! Hello kind sir, would you like to come in and try our new egg rolls.
Hoss: Hmm. (stares at Boss) Egg rolls, huh? Sounds good. (enters restaurant)
Boss: Man, that guy was ugly!
TV Announcer: This neutral country is famous for Swiss Cheese, Swiss Chocolate, and Swiss Bank Accounts!
Dracula: What is Peru?
TV Contestant: What is Switzerland?
Dracula: Switzerland! Dracula knew that.
Killdozer: Billy, you saved my life, you're my hero!
Billy: Hero? Do you mean it? Mandy, Grim, I'm a hero! I'm a hero!
Mandy: You're now hero, Billy. You're just a boob that got lucky. So where did Boss go to, Grim?
Grim: I don't know Mandy, the scythe could have completely obliterated him, or zapped him into some freaky dimension.
Giant Scorpion: My babies!
Dracula: Well, maybe if you didn't make your babies so delicious, Dracula wouldn't have had to eat 'em!
Second appearance of Dracula. He first appeared in the Season 5 episode, Home of the Ancients.
Dracula keeps referring to Grim as "Skeleton Man".
Eighth appearance of Skarr, and the fourth time in a row.
Tenth appearance of Hoss Delgado, and second time in a row.
Credits: Burt the truck driver is having tea and a conversation with Orc the Sand Bandit.
Running Gag: The narrator comparing Grim and Dracula's actions to an angry woman.
Mandy has no dialogues in "Fear and Loathing in Endsville" for the second time while Billy had only one line.
Sir Boss Del Guapo looks like Hoss Delgado, only without the eyepatch and a metal hand.
The game Grim and Burt the truck driver were playing is Connect Four.
Character: Sand Bandit
The "Sand Bandit" is a reference to the "Sand People" who reside on the planet Tatooine in Star Wars . The exterior of the Sand Bandit's house is similar to Luke Skywalker's home on the same planet, and the "car" lent to Grim is the desert vehicle ("Sand Crawler") used by the Jawas (another species of alien native to Tatooine.
"Dracula: Nah, see that's a myth. Dracula scrape with his fangs and lick up the blood. Like this... (demonstrating) See, scrape and lick! Scrape and lick!" he maybe refering to real vampire bats
Dracula says "dummy" just like Fred Sanford from Sanford and Son. Plus he shares the same look.
Episode Title: Fear and Loathing in Endsville.
This is a reference to the book, Fear and Loathing in Las Vegas by Hunter S. Thompson.
TV Announcer: This show starred a bear with an evil brain attached.
The bear with an evil brain attached refers to Boskov the Bear and Hector Con Carne from Evil Con Carne.
Comparison: Dumb-Dumbs and Dragons
It has made many references to the Karate Kid series. Also, there was a SpongeBob SquarePants episode that aired 30 minutes earlier dedicated to Noriyuki "Pat" Morita(1932-2005), or Mr. Miyagi of the Karate Kid series.
Game Show: Jeopardy
The Game Show that Billy, Mandy, and Dracula and his folks were watching seemed to be something similar to the game show, Jeopardy!.
Episode Title: Dumb-Dumbs
It could be a spoof of Dum-Dums. The small Lollipop with many flavors which says "Keep the rapper for stuff!"
Episode Title: Dumb-Dumbs and Dragons
It is a parody of Dungeons and Dragons.