User blog comment:CandaceFan/Phineas and Ferb Trivia/@comment-5137023-20101124004547

Fine. Here are the answers:

Phinedroids

Amanda (She sounds like Harper)

Nobody, as they don't speak.

Unknown, Ferb (with Phineas and Isabella), People think it's Ferb, Swampy Marsh

Candace, Ferb, Gretchen

Maybe Isabella

Hail Doofania!

Undead

introduce, decomposing, undead

Doofenshmirtz (the first two), Lawrence