Ninja Turtles and Ben 10 Crossovers
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Tongue Tied by NixKat
Casey is happy for his aunt but words fail him.
Rated: K - English - Family - Chapters: 1 - Words: 289 - Published: 5/18 - April O'Neil, Casey Jones, Leatherhead - Complete
Gala by NixKat
Leatherhead meets an interesting woman at a gala.
Rated: K - English - Romance - Chapters: 1 - Words: 152 - Published: 2/7 - Leatherhead - Complete
How to greet an alligator by NixKat
Casey's aunt comes over for his wedding preparations and meets someone new.
Rated: K+ - English - Romance - Chapters: 1 - Words: 284 - Favs: 1 - Follows: 1 - Published: 1/30 - Casey Jones, Leatherhead - Complete
Latenight Gaming by NixKat
Undertale seems like the perfect game for Leatherhead. This fic is an Devin lives AU for my Contact AU.
Rated: K+ - English - Romance/Family - Chapters: 1 - Words: 337 - Favs: 2 - Follows: 1 - Published: 1/24 - Complete
Metamorphosis by NixKat reviews
Not long after his trip to Bellwood, a certain vigilante is going through some changes and they may not be for the better. Things go from bad to worse when a certain government agent shows up. Crossover between Ben 10:AF/UA and TMNT. Warning: violence, gore, foul language, and body horror. Parings include: Gwevin (Gwen/Kevin), Benlie (Ben/Julie), and Capril (Casey/April).
Rated: T - English - Family/Sci-Fi - Chapters: 5 - Words: 9,935 - Reviews: 5 - Favs: 6 - Follows: 5 - Updated: 9/4/2013 - Published: 12/24/2012 - Casey Jones, Kevin
The Cross-dimensional Adventures of Ben 10: Hero meets Ninja Turtles by Man of cartoons reviews
After his adventures with the Teen Titans, Ben (again) is needed in another universe. Meanwhile, Leo searches for his captured brothers alone...that should be easy. Except his in one of the Shredder's high strong fortress with little chances of winning. With the Shredder and his goons after him, he will need a hero's help. THE BEN 10 CROSSOVER WITH TEEN TITANS IS COMPLETE.
Rated: T - English - Humor/Adventure - Chapters: 2 - Words: 19,061 - Reviews: 13 - Favs: 23 - Follows: 5 - Updated: 8/27/2013 - Published: 8/8/2013 - Leonardo, Ben T. - Complete
Contact by NixKat reviews
Feeling miserable after his energy induced rampage Kevin calls his favorite cousin over for a visit. But when Casey Jones is in town things won't be peaceful for the Osmosian, especially since a certain villain is sceaming. Rated T for language and violence. Crossover with Ben 10 AF/UA and TMNT. Pairings: Gwevin, Benlie, Capril (Casey/April)
Rated: T - English - Family/Friendship - Chapters: 7 - Words: 17,435 - Reviews: 7 - Favs: 12 - Follows: 7 - Updated: 12/21/2012 - Published: 5/6/2012 - Casey Jones, Kevin - Complete
Double Trouble by Kazriku reviews
(BEING REWRITTEN) Crossover: Ben10. Mikey was saved by Ben Tennyson and friendship blooms. However, this means double the trouble! Lots of villains are after them, specially Mikey? DT: Rebirth is merged in this story to prevent confusion from readers. UPDATE: Ch 42.
Rated: T - English - Adventure/Friendship - Chapters: 44 - Words: 79,584 - Reviews: 73 - Favs: 44 - Follows: 17 - Updated: 7/22/2009 - Published: 6/26/2008 - Michelangelo, Ben T.
Teenage Mutant Ninja Turtles alien force by S.Ganon reviews
Ch'rell has escaped from prision,returned to Earth and is now in Bellwood. In this mutant turtles/Ben 10 alien force crossover, Ben and the Turtles must join forces in order to defeat the Utrom Shredder once and for all.
Rated: K+ - English - Humor/Adventure - Chapters: 3 - Words: 3,295 - Reviews: 7 - Favs: 8 - Follows: 5 - Updated: 3/22/2009 - Published: 12/11/2008