SonChili

SonChili is the cargo ship between Sonic and a Chili Dog from the Sonic the Hedgehog fandom.

Canon
Sonic was shown to love chili dogs in the 90s cartoons (Adventures of Sonic the Hedgehog, SatAM, Sonic Underground) as well as the Archie comics and Sonic the Comic.

In the games, Sonic's love for chili dogs wasn't shown until Sonic Unleashed (with the exception of them being mentioned in the Japanese manual of Sonic Advance 3 and Sonic briefly mentioning them in Sonic Chronicles: The Dark Brotherhood). Since then, chili dogs have appeared in some games.

Chili dogs also make an appearance in Sonic Boom.

Fanon
SonChili is a popular cargoship in the Sonic fandom. However, it is rarely referred to by its ship name.

Fandom
AO3

DeviantArt
 * sonicxchilidog tag on DeviantArt