I've decided to rewrite the entire Monsters Vs Aliens but with Sonic because why the heck not. I've rewatched the movie one night and now it's taken over my life. This does not follow the exact same lines from the movie [this fic contains things like G/T, possible graphic descriptions, possible harsh language] I'm not a professional writer, I like to write for fun. Never the less, I hope you enjoy what I did If you want to see more content of the au, you can find it here: https://www.tumblr.com/weirdozjunkary

Months have passed since the Turtles have defeated their arch nemesis Shredder and all is well in New York City. However though, things are not as peaceful as the Turtles could hope for. One night while out on patrol a mysterious vortex portal is activated sending the four brothers into another world full of Mobians who struggle to keep Dr. Eggman at bay but luck is on their side once all of Team Sonic including Sonic himself discover the Turtles. Join the Turtles Leonardo, Raphael, Donatello and Michelangelo in their battles side by side with the Mobian heroes Sonic the hedgehog, Amy Rose, Tails the fox, Sticks the badger and Knuckles The echidna as they face the evil Dr. Eggman every day in order to keep the world safe from harm while also even, in some cases, dealing with Metal Sonic the Badnik and Shadow the Ultimate Lifeform and prepare for awesome teamwork between the beloved heroes from two different worlds! Note: This takes place after the TMNT 2012 show and during Sonic Boom, I don't know much about TMNT honestly so forgive me if I get the Turtles' personalities wrong and if you don't like Sonic Boom you don't have to read it, this story is towards people who do like Sonic Boom but I won't make it stupid like how a lot of people thinks it is in this story so please give it a chance. And one thing is that updates might be slow so I apologize if it takes a little while for a new chapter to come out. Enjoy! :) (TMNT belongs to Nickelodeon and Sonic Boom belongs to Sega and Cartoon Network so this story is just a fan fiction/crossover thing)

Alright so amy has a magic heart. Her heart has the power to work all seven chaos emeralds so bad guys can rule the world DUN DUN DUN.... Anyways her past boyfriend Noah dated her when she was 13. Little did she know that Noah was eggmans cousin. So one day Noah tried to steal her heart. Thankfully he didn't. Shadow and silver ( her brothers) came and saved her. Ok not gonna tell you the rest your going to have to read the story :3

Sonic the pirate and an explorer of the seas comes to face reality that the lost city of Atlantis and merpeople are not a myth or a fairytale, they are real.

Sonic and Amy woke up with amnesia and cannot remember each other or their friends. And they have to figure out how to regain their memories by getting help and working together.

my was emotionally hurt by mean fan girls and it made her change her style into a goth. Sonic was desperate to have his old Amy back but could not reason with her easily and the only way to get her attention is by being a goth like her.

Sonic and Amy can't seem to learn about each other's differences in life. But what if they accidentally switched bodies? Will they learn what it's like to be each other?

Sonic and Amy both break each other's hearts and they get into a deadly and powerful argument. When that happens they transform into very powerful forms that would try to destroy each other in a fight. Dark Sonic vs Light Amy.

Sonic the 150 year old vampire hedgehog and the protector of Amy Rose the mortal pink hedgehog. Sonic made a promise to protect Amy from harm and from any male vampire.

From the story SonAmy Boom Fusion Hedgehog, it tells us how Sonic and Amy as a fusion hedgehog are working together to get along.