Shermellope is the name given to the pairing of Sherman Peabody from Mr. Peabody and Sherman and Vanellope von Schweetz from Wreck-It Ralph. Though not a widely popular pairing, it does have several loyal fans.
This is not a large ship. However, there are many pieces of fanart that display this pairing. The pairing of Shermellope is more than likely based on both of the characters' young ages. This may also be due to the fact that both of their movies are science-fiction and technologically based.