75 GIR, I Know What We're Gonna Do Today! » by AgentInvaderMinionofDoom GIR manages to send himself, Zim, Dib, and Gaz to another universe - which is Phineas and Ferb's backyard! What happens when Candace and Dib team up? Will Isabella make a new friend? What trouble does Gir get into? How will they get home! CHAPTER 12 IS UP! Thanks for your patience with this story; it's not abandoned! Rated K plus for mild cartoon wrestling.
K+, English, Adventure & Friendship, chapters: 12, words: 15k+, favs: 44, follows: 39, updated: 6/16/2014 published: 7/15/2010
7 Crossover Cruise ship » by AnonymousBiscuits IMPORTANT MESSAGE! When Dib,Zim,Jackie,Ryan,Penny,Phineas,Ferb,and Timmy get tickets to attend a cruise ship and do school, it gets more weirder on deck! Disclaimer inside story. Cartoons: Phineas and Ferb, Invader Zim, Fairly Odd Parents.
K+, English, Humor & Adventure, chapters: 3, words: 2k+, favs: 5, follows: 5, updated: 11/16/2013 published: 12/3/2011, Dib, Phineas
5 A Series of Madness by Galaxina-the-Seedrian Many years after facing a universal war, friends and enemies must come together to face an even bigger threat: the Nightmare...while these group of friends are busy handling their lives as sanity keeps escaping their grasp. AU; rated for violence and crude humor
K+, English, Humor & Drama, words: 1k+, favs: 3, follows: 5, 7/5/2012
2 Invader Miz by InvaderMarcelene Miz is sick of Zim ruining her plans, so she packs up her bags and leaves for Ir, FaOCr.
K+, English, Sci-Fi & Romance, words: 816, favs: 2, follows: 1, 11/20/2010, Phineas
16 Punishment » by InvaderZimWannabeX3 Some mistakes leave you wondering what went wrong. Sometimes, you just have to suffer to find the answer.
K, English, Adventure & Friendship, chapters: 2, words: 658, favs: 5, follows: 7, 4/17/2010, Zim, Phineas
25 Zimeas & Girb » by Invisibool When GIR gets Zim lost, he meets Phineas, Ferb, and their friends. Their projects urge Zim to use the kids to create his Earth ruling weapon for him. Meanwhile, Minimoose follows Perry on one of his missions. Contains slight one-sided Gir/Isabella. Enjoy!
K+, English, Humor & Romance, chapters: 3, words: 869, favs: 12, follows: 14, updated: 5/5/2009 published: 4/27/2009, Zim, Phineas