Phineas and Tails

Plot
Sonic and friends have gone to Danville, away from Station Square for a vacation. But, Sonic stumbles onto Agent P's lair, and becomes the OTHER Agent H. Perry and Sonic go off to defeat Doofenshmirtz and Robotnik (Eggman). Norm meets Orbot and Cubot (the robots that were capturing the Wisps in Sonic Colors). Phineas, Ferb, and Tails decide to build the PF Tornado. But, can Sonic escape Amy and Candace? If Candace and Amy see Sonic and Perry, Agent P could lose his job! This is the Sonic X and Phineas and Ferb crossover you would not want to miss!

Friendships
Phineas and Chris (Sonic X)

Ferb and Tails

Buford and Knuckles

Suzy and Cream (and Cheese)

Perry and Sonic

Doofenshmirtz and Eggman

Norm and Orbot and Cubot

Doof-Bots (Transport-inators of Doom) and Badniks (Sonic 1)

Candace and Amy

Thaddeus and Shadow

Thor and Rouge

First Games the Sonic Characters Appeared In
Chris (none)

Tails (Sonic the Hedgehog 2)

Knuckles (Sonic the Hedgehog 3)

Cream and Cheese (Sonic Advance)

Sonic (Sonic the Hedgehog)

Eggman (Sonic the Hedgehog)

Orbot (Sonic Unleashed) and Cubot (Sonic Colors)

Badniks (Sonic the Hedgehog)

Amy (Sonic the Hedgehog CD)

Shadow (Sonic Adventure 2)

Rouge (Sonic Adventure 2)

Songs
Phineas X (Phineas and Ferb vs Sonic X themes)

Doofenshmirtz and Eggman Inc. jingle

Busted (Candace and Amy)

Sonic Underground theme