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Mario and Sonic: Heroes Unite!
by Azurixx reviews
After a big battle against Eggman, Sonic and his friends get sucked into Mario's universe. At first, their main priority is to get back home, but they realize they must work together to stop an evil force, bigger than Eggman and Bowser's powers combined!
Crossover - Sonic the Hedgehog & Mario - Rated: K+ - English - Adventure/Drama - Chapters: 100 - Words: 371,110 - Reviews: 736 - Favs: 261 - Follows: 139 - Updated: 8/27/2013 - Published: 7/8/2010 - Sonic, Mario - Complete
What Happens Next
by The Red Dove reviews
The woman in orange looked to the man in orange. They both knew that the other had been through more than anyone should,and that they would both do whatever it takes to save the world. "Let's go." Alyx said. The other two nodded, and followed Alyx.
Crossover - Half-Life & Portal - Rated: T - English - Friendship/Horror - Chapters: 32 - Words: 42,084 - Reviews: 174 - Favs: 66 - Follows: 85 - Updated: 5/5/2013 - Published: 10/1/2011
by ShadowPhantom14 reviews
Why does he know so much about Aperture Science? GlaDOS calls him the "perfect tester", and when Wheatley shows up, it's time his friends knew the truth. But what truth? What has Sonic been hiding all this time?
Crossover - Sonic the Hedgehog & Portal - Rated: K+ - English - Family/Friendship - Chapters: 15 - Words: 20,281 - Reviews: 61 - Favs: 62 - Follows: 56 - Updated: 7/30/2012 - Published: 5/16/2011 - Sonic, Wheatley
Blue Blur In Equestria
by D.K.N reviews
Shortly after defeating the Black Arms, an incident with Tails' new invention tosses Sonic across the realms and into Equestria. There, he discovers that this world will soon need his help. Rated T for violence and language.
Crossover - Sonic the Hedgehog & My Little Pony - Rated: T - English - Adventure - Chapters: 12 - Words: 52,864 - Reviews: 32 - Favs: 44 - Follows: 27 - Updated: 7/9/2012 - Published: 1/21/2012 - Complete
Knuckles in Ponyville
by Hanatro reviews
Knuckles has been knocked unconscious by Dr.Eggman and Fluttershy decides to take him in and return him back to health
Crossover - Sonic the Hedgehog & My Little Pony - Rated: K - English - Romance/Friendship - Chapters: 21 - Words: 19,233 - Reviews: 55 - Favs: 18 - Follows: 9 - Updated: 12/17/2011 - Published: 8/24/2011 - Knuckles, Fluttershy
by Happymystery12 reviews
What happens when you put iCarly and Sonic the Hedgehog together? INSANITY! I need OC's for this story! Rated JIC. Pairings include SonOC and Seddie.
Crossover - Sonic the Hedgehog & iCarly - Rated: T - English - Humor/Romance - Chapters: 4 - Words: 6,254 - Reviews: 107 - Favs: 25 - Follows: 19 - Updated: 7/14/2009 - Published: 7/9/2009 - Sonic, Carly S.
Mario & Sonic Teleporting to Worlds reviews
Sonic and his friends get teleported to Mario's world by accident in a fight against Eggman, Now, They must find the Chaos Emeralds to come back to their world, with some help from Mario & Friends. Rated T Just in case
Crossover - Sonic the Hedgehog & Mario - Rated: T - English - Chapters: 4 - Words: 2,067 - Reviews: 3 - Updated: 1/21/2012 - Published: 1/18/2012