The circumstances in which Sid is presented in this series correspond largely to the Mirage comic book. In the 2003 TV series, Sid was looking for the buried treasure in the farm because he had to pay back the gambling debt he owed the Purple Dragons. Casey and April selflessly helped to cancel his debt with the Dragons.
Sid changed for the better and returned to the farm house as a guest at April and Casey's wedding. Casey's mother explained that she told him about Casey and April's "friends", and that if he told anybody about them, she'd bust his kneecaps. Sid later participated in the general brawl that broke out following the Cyber Shredder and the Foot Clan's attack on the wedding.
Animated series (2012)
In the 2012 CGI series, the name Sid appeared in connection with a muscular member of the Purple Dragons - here a street gang in Chinatown. This character was named by series writer Jeremy Shipp; whether this character is a reference to Sid Jones, is not known.
Sid is again a cousin of Casey. Sid and Casey have a very bumpy relationship. It's because of him that Casey is kicked out of the hockey team. It later revealed that Sid is a Foot Ninja.