Crossovers tend to thrive in the world of fanfiction. How else could we read about Goku taking on the Titans with a Spirit Bomb? But it doesn't always have to be that way. Thanks to fever dreams and a love of money, some companies have created official crossovers for some of our favorite anime and manga series!

1. Tsubasa: Reservoir Chronicle

An alternate universe setting that brings together characters from Cardcaptor Sakura, RG Veda, X/1999, and xxxHolic.

2. Cross Epoch (Dragon Ball x One Piece)

What happens when the biggest shonen franchises meet? Fun and joy is what happens.

3. Dream 9 Super Collaboration Special

Two part anime special created to celebrate three years of the Toriko anime. A race for tasty and expensive meat has never been so intense.

4. Fairy Tail x Rave

Hiro Mashima created this special crossover to two of his most popular works, and it was later animated as an OVA special. It's great to see the characters from Rave animated again.

5. Fairy Megane (Fairy Tail x Flunk Punk Rumble)

Hiro Mashima teamed up with his former assistant Mika Yoshikawa (creator of Yamada-kun and the Seven Witches) to create this cross over about a group of student who mistake the Fairy Tail guild for a company.

6. Attack on Avengers

Created as an 8 page special for Free Comic Book Day, this is a bizarre cross over between Attack on Titan and Marvel's Avengers. At least it's free to read, right?

7. CB Chara Go Nagai World

Take Go Nagai's beloved and dark works, chibify them, and you have yourself one enjoyable cross over series.

8. Lupin III vs. Detective Conan

The world's greatest thief and the world's greatest detective team up to solve a pair of mysterious deaths. A sequel was also made.

9. Carnival Phantasm

Take the beloved characters from the Nasuverse and place them in one of the most fun series you'll ever see. It's so good to finally see Tsukihime in an anime!

10. Toriko x One Piece

Toriko and One Piece has collaborated for one manga special and two anime specials in the past. This makes sense since the two mangakas are great friends.

11. Pretty Cure All Stars

There are three absolutes in life: death, taxes, and Pretty Cure All Stars movies. Cross over movies have been released yearly since 2009, each with varying degrees of quality.

12. A Magnificent Banquet

Shokugeki no Soma is known for, ahem, foodgasms. So you can expect plenty of fanservice when some of the heroines of Shonen Jump are invited to eat at a banquet.

Don't Forget these two video games:

13. J-Stars Victory VS

We all have battled with fans about who we think is the strongest in the history of Jump (it's Kenshiro damn it!). Now we can battle it out in this fun game.