When Fred's talking about Spanish letter "Ñ" he explains that the word "MAÑANA" should have 'tilde' on an N and he writes it. Then, we can see in his notebook that he has written "MANAÑA" and the correct Spanish word is "MAÑANA", with tilde on the first N (and not in the second as he wrote).
(huffing and puffing after climbing up the pyramid)
Shaggy: Like if the Aztecs were so brilliant, why didn't they invent an elevator?
Shaggy: Oh great. A dark spooky tunnel. I hate dark spooky tunnels!
(after reading the warning on their van)
Shaggy: Looks like someone wants us to make like a piñata and beat it.
(running from the sound of the monster and opened and shut the door after seeing Fred)
Shaggy: No, Scoob, he's trying to break in!
Up to now, B.J. Ward had been Velma's voice in the Warner-produced made-for-video animated Scooby movies. This movie marks the return of Nicole Jaffe as Velma.
"Pay no attention to the man behind the curtain."
The ghost says this as the gang gets close to finding the guy responsible for the fake ghost. This is a famous quote from the movie The Wizard of Oz.