Fics like If Doofenshmirtz had a penny everytime he saved a little girl in Japan, he would have two penny and two additionnal daughters.

In which a platypus and a bad supervillain are in japan and save the day. Twice. Which is not a lot but weird it happened twice.

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5. Myriads of Shards of the Connexions between Us by WinryWeiss (Phineas and Ferb)
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12. Everybody Needs Somebody to Love by CongressIsAliens (Phineas and Ferb)
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14. Platypus Gone Rogue by TheSpiderWriter (Phineas and Ferb)
15. If You'll Still Have Me by kittyhazelnut (Phineas and Ferb)
16. You pulled all your stitches out because you had to fistfight me by KissingLizard (Phineas and Ferb)
17. The Other Brother by detectivejigsaw (Gravity Falls, Phineas and Ferb)
18. A New Suit by DesdemonaKaylose (Phineas and Ferb)
19. it's not often that i understand by The_Bookkeeper (Phineas and Ferb)
20. Time Out by radondoran (Phineas and Ferb)