Disclaimer I don't own Harry Potter or Phineas and Ferb. Just so you know only Phineas, Ferb and Isabella are in this one. Ferb talks more then the show
Chapter 1
This is a story of Phineas, Ferb and Isabella going to Hogwarts starting when they are getting supplies.
"Ferb, we should go to Gringotts before we get supplies," Phineas said. As they enter Phineas says, " Vault 1011 and 1012 please."
Griphook replies," Yeah whatever."
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"Okay Ferb let's go get are robes."
In Madam Malkin's robe shop Phineas and Ferb find 2 boys. One with messy black hair and one with a pale, pointed face. The pale boy was talking to the black haired boy about Hogwarts and some random words like Hufflepuff and Slytherin.
"Hi I'm Phineas and this is Ferb."
"Hi I'm Harry Potter."
"I am Draco Malfoy fell free to ooh and ah."
"He's a real annoying guy," Harry told Phineas.
"I heard that!" Malfoy yelled.
"Anyway were here for robes," Phineas said.
"Okay you two are done. Now you boys step up here," Madam Milken said.
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"Let's get our wands," Ferb said.
At Ollivander's wand shop.
They got to meet Isabella.
"Isabella?" Phineas asked.
"Hi Phineas." She replied. "I got a 7 inch maple and unicorn horn."
" Nice."
(Phineas get's a 10 inch oak and phoenix feather. Ferb got a 8 inch elm and unicorn horn.)
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Phineas, Ferb and Isabella got everything but there cat, toad or owl.
"Isabella, what animal are you getting?"Phineas asked.
She said," An owl."
"Us to!"
At the owl shop they bought 2 owls Phineas got a snowy owl and so did Ferb. They named them Walnut(P) and Cracker(F). Isabella got a cat instead, she named her Ada.
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So they left and waited for Hogwarts by renting a hotel at London.
Tell me wait you think.