Dora, the brave explorer with her orange shirt and backpack, walks hand-in-hand with Boots, her monkey friend in red boots, as they collect shiny acorns under the fading purple sky. Suddenly, a translucent white figure with hollow eyes and rattling chains emerges from behind a gnarled oak, moaning eerily. "Boots, did you see that? It's a ghost! We have to run!" "¡Ay, Dora! It's coming after us! Let's get out of here fast before it catches us!"

Dora and Boots sprint through the underbrush, hearts pounding, glancing back at the pursuing ghost's glowing form weaving between ancient tree trunks. They burst into a clearing where tiny glowing shapes flicker like fireflies. "Geo! Umizoomi! Help! A scary ghost is chasing us through the forest, and it's getting closer with every spooky moan!" "Yeah, it's super white and floaty with chains that clank like thunder! Please save us!"

Geo, the math whiz with his blue helmet and tool belt, and Umizoomi, his tiny energetic partner with pink hair and a bubbly laugh, jump up from their pattern puzzle. "Don't worry, Dora and Boots! Tell us everything about this ghost – how tall is it, what color are its eyes, and does it move fast or slow? We'll use super math to figure out a plan!" "Yeah! We've got pattern power and Umi-vision to scan it. Together, we'll turn the scare around and make it run away!" "It's about as tall as a big tree, with glowing green eyes and chains dragging behind!"

Geo and Umizoomi quickly craft scary ghost costumes from sheets, adding math-patterned chains and eye holes that glow like the real ghost's. Dora and Boots slip into matching outfits, just like Bubble Puppy and Mr. Owl wore on those fun Halloween nights to prank the Bubble Guppies and Franklin the Turtle and his friends. "This reminds me of Halloween nights when Bubble Puppy and Mr. Owl dressed as ghosts and scared everyone with their boo tricks – now it's our turn to be the scary ones!" "¡Sí! Let's practice our moans: Oooooh! Perfect for scaring that ghost away!"

Dressed as a pack of howling ghosts, Dora, Boots, Geo, and Umizoomi leap out from the shadows, chains clanking and green eyes flashing. The real ghost freezes, then shrieks in terror at the sight of more ghosts, its translucent form trembling violently. "Boo! We're the scariest ghost team ever! Run away, ghost, this forest is ours now!" "Math power says four ghosts beat one – retreat!"

The ghost flees into the woods, screaming wildly as it vanishes over the hill, leaving peals of laughter behind. "Yay! We did it, everyone! The ghost is gone, and we had the best Halloween adventure ever!" "¡Gracias, amigos! You're the bravest!" Dora hugs her friends before racing home through the sun-dappled path to tell her moms all about the spooky chase and clever costume scare.