Sure! Here's a fun and thematic setup for your scenario with October, Caspar, and Sneaky planning a surprise party.

Title:The Sneaky Surprise Bash

Genre: Animated Comedy / Holiday Special / Family
Summary:
In the festive town of Chaville, October the Halloween-loving prankster, Caspar the cheerful Christmas fan, and the elusive Sneaky team up to throw the ultimate surprise party. But with over a hundred unpredictable cockroaches, secret powers, and explosive personalities, keeping a surprise is easier said than done. Can this trio pull off the perfect party before someone accidentally (or intentionally) spills the beans?

Screenplay

Scene 1: "The Idea" – Interior – October's Haunted Treehouse – Evening
(Spooky music plays. Pumpkins flicker. October, wearing a jack-o'-lantern hoodie, is surrounded by fog and fake cobwebs.)

October
(grinning)
Guys… it's time. We throw… THE ultimate party. Surprise-style.

Caspar
(wearing a Santa hat, sipping hot cocoa)
A surprise party? Like, with presents and mistletoe? I LOVE IT!

Sneaky
(pops out from the shadows, whispering)
We'll need... stealth. Silence. Disguises. I've got plans.

(He holds up blueprints titled: "Operation: Sneaky Surprise.")

Scene 2: "Planning & Prepping" – Montage

October decorates with cobwebs, fog machines, and candy buckets.

Caspar wraps presents, decorates a Christmas tree, and bakes cookies.

Sneaky sneaks through Chaville, stealing confetti, DJ gear, and balloon machines without anyone noticing.

Scene 3: "Suspicion Rising" – Oggy's House – Day
Oggy is cleaning as suspiciously wrapped boxes pile up at his door. Piya finds glitter footprints and sniffs toward the treehouse.

Jack
(looking through binoculars)
They're up to something. Something... sparkly.

Scene 4: "The Chaos Before the Calm" – Party Venue – Twilight
Dozens of cockroaches appear early, explosions go off, confetti explodes too soon, and Hero flies in thinking it's a disaster drill.

October
Nooo! They weren't supposed to come until the countdown!

Caspar
It's okay, October! It's still magical!

Sneaky
(facepalms in silence, then tosses smoke bomb)
Plan B.

Scene 5: "The Surprise" – Oggy's Backyard – Night
The fog clears. Fairy lights glow. Music kicks in. Everyone yells:

All
SURPRISE!

Oggy, Jack, Olivia, and the rest of the cast are genuinely stunned. Piya trumpets happily. Joey Jr. sets off fireworks by accident, causing Joey to chase him with a TNT stick.

Final Scene: "Party All Night" – Everyone Dances

Disco Roach spins records.

Melody sings.

Sparky powers the lights.

Luna and Sunny control day-night lighting effects.

October, Caspar, and Sneaky toast juice boxes.

October
(smiling)
Best. Party. Ever.

Caspar
Merry Surprise-mas!

Sneaky
(holds up sign: "Mission: Accomplished.")

Would you like me to make a poster or scene illustrations next?