The Scary Halloween Spooktacular Party Of Horror!

Basically, Phineas and Ferb have a Halloween party with all their friends. Two new kids, Thalia and Namashi Capellan, who are creepy twin sisters, show up as well.

 Songs 

Be Very Afraid Of My Halloween Party by Phineas and the other partygoers

Trick Or Treat by the partygoers

 Trivia 


 * Third Halloween episode ("One Good Scare Ought To Do It", "Monster Of Phineas-and-Ferbenstein")


 * The creepy twins Thalia and Namashi were based on Gaz from "Invader ZIM", and the twin girls from "The Shining".