Phineas and ferb/Sonic the hedgehog (Crossover)

Plot
Phineas, Ferb, Perry, Isabella, And Doofensmritz meet sonic. Dr eggman robotnik is after sonic and his friends. It's up to the gang to stop eggman robotnik.

Characters

 * Phineas
 * Ferb
 * Lawrence
 * Linda
 * Candace
 * Perry
 * Isabella
 * Buford
 * Heinz Dofensmritz
 * Carol
 * Buljeat
 * Sonic
 * Tails
 * Dr. Eggman Robotnik
 * Dr. John
 * Zoery

Parts
Part One

Part Two

Part Three

Part Four

Part Five