Fics like Codename: Teens Next Door Operation: BEYOND

One year has passed since Father's defeat. The members of Sector V, without their memories, begin their sophomore year in highschool. However, the world isn't as peaceful as they think: the Galactic Kids Next Door have made Earth their next target while an old enemy lifts their head, seeking revenge. But when an operative who everyone had thought had dissapeared, returns with unexpected allies, the battlelines are drawn as a climatic battle for the entire galaxy begins, but can the Kids Next Door and the Teens Next Door succeed against impossible odds and go beyond their limits?

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  2. Operation: GALACSIA by Gamewizard2008 (Codename: Kids Next Door, Invader Zim, more)
  3. Codename: Kids Next Door Operation: RETRIBUTION by Gettan49 (Codename: Kids Next Door)
  4. Naruto's Weird and Lewd Family by LuciusWalker (Velma (Cartoon 2023), Naruto (Anime & Manga), more)
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  6. The Dynesty by darktrk (DC Super Hero Girls (Cartoon 2019), The Loud House (Cartoon), more)
  7. The Junior Executive by grocamol (幼女戦記 | Youjo Senki | Saga of Tanya the Evil (Anime), 幼女戦記 | Youjo Senki | Saga of Tanya the Evil (Manga), more)
  8. Operation: B.U.T.T.E.R.F.L.Y. by NullenVoid (Parahumans Series - Wildbow, Codename: Kids Next Door)
  9. The Candygirl by FireFlamerx9z (Codename: Kids Next Door)
  10. Haywire by lightning_bird (Cartoon Network Universe: FusionFall, FusionFall, more)
  11. Luck Of The Draw by Harrish6 (Sonic the Hedgehog - All Media Types, Sonic the Hedgehog (Archie Comic), more)
  12. Nextgen Kids: Eve of Apocalypse by Gamewizard2008 (Codename: Kids Next Door, Ape Escape, more)
  13. KND: Operation: S.Q.U.A.D. by Dylan_Hergs (Codename: Kids Next Door)
  14. Kirby Takes Manhattan by Chrysanthos (Betty Boop (Short Films), Harry Potter - J. K. Rowling, more)
  15. After All, I'm Only Ten by WhiteCabaret (Codename: Kids Next Door)
  16. T.H.R.O.U.P.L.E: Three Hearts Rallying On Uniting Partnership, Love, & Emotion by orphan_account (Codename: Kids Next Door)
  17. Kindling on Cherry Lane by RoseShower (Codename: Kids Next Door)
  18. Codename Kids Next Door: OPERATION - FAMILY CRISIS by MapleIceCreamVan (Codename: Kids Next Door)
  19. Age is Just a Numbuh by lightning_bird (Cartoon Network Universe: FusionFall, Dexter's Laboratory, more)
  20. Say You Love Me by BeingCapricious (Powerpuff Girls, Powerpuff Girls Doujinshi (Webcomic), more)