User blog comment:Bowser101/favorite P&F couples (WARNING: any wars and yer gonna get it!)/@comment-1780574-20100125025403

PHINABELLA PHINABELLA!
 * Phineas went to great lengths to make a giant ice cream sundae for her after she had her tonsils removed ("I Scream, You Scream").
 * When Isabella's dog Pinky swallowed her sash, he and Ferb built a shrinking submarine to retrieve it ("Journey to the Center of Candace").
 * On the day Isabella got hiccups, he convinced Ferb and friends to build a haunted house to scare them out of her, and he dedicated the whole day to her, he also held her hand all the time going through the haunted house alone.("One Good Scare Ought to Do It!").
 * Phineas built a "Rainbow-inator" for Isabella when he thought she expressed a desire to see a rainbow, having never seen one before. When she clarified that she wanted to see a unicorn, Phineas decided that he and Ferb would find her one the next day ("Hail Doofania").
 * Phineas held a game show so Isabella and the Fireside girls could get their broadcasting patches. ("Let's Take a Quiz").
 * Phineas and Ferb assisted Isabella and the Fireside Girls in building the world's most elaborate automated car wash when they needed to save the Star-nose mole through means of fundraising. ("At the Car Wash").