Fics like The Problem with being a Platypus

What if the Flynn-Fletchers are the secret agents instead of the platypus? ---○ Where Perry is the family's emotional support pet

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1. Half a Step Clockwise by NPP6 (Phineas and Ferb, Phineas and Ferb the Movie: Across the 2nd Dimension (2011))
2. Midnight Googling by wordsurge4 (Phineas and Ferb)
3. Watching of Across the 2nd Dimension by Razena (Phineas and Ferb, Phineas and Ferb the Movie: Across the 2nd Dimension (2011))
4. What's She Doing Here? by kittyhazelnut (Phineas and Ferb)
5. Towards the Sun by Word_Addict (Phineas and Ferb, Gravity Falls)
6. Maybe He's Just Taciturn by BlackEyedGirl (Phineas and Ferb)
7. Playing Dead by PopcornFairy28 (Phineas and Ferb)
8. Give Me Something To Cry About by IronicAppreciation (Phineas and Ferb)
9. The First Step is All it Takes by Fawnalikes2write (Phineas and Ferb)
10. Waterlogged by TolkienScholar23 (Phineas and Ferb)
11. Silent Understanding by WinryWeiss (Phineas and Ferb)
12. On the Rooftop by LigerCat (Phineas and Ferb)
13. Let's all assume the worst by KissingLizard (Phineas and Ferb)
14. well, i wanna go back (but i'm halfway to the place where we will meet) by flibbertygigget (Phineas and Ferb)
15. There’s an “M” in time machine by TimberedFir2048 (Phineas and Ferb)
16. Aren't you a little grimdark to be in a Disney crossover? by Masterweaver (Parahumans Series - Wildbow, Phineas and Ferb)
17. Perry-digm Shift by talanashta (Phineas and Ferb)
18. does it make you freak out? by cozyqueerchaos (Phineas and Ferb)
19. Team Teal Talks by Wanderbird (Phineas and Ferb)
20. Be Right There by orphan_account (Phineas and Ferb)