Coderra

Coderra is the het ship between Cody and Sierra from the Total Drama fandom.

Canon
Because like everyone in her family she is a Chris McLean fan, Sierra followed Chris's Total Drama show that Cody starred in and had a crush on him.

Total Drama: Action
Cody forms a band with three other reality contest contestants (Trent, Justin and Harold) and Sierra becomes their fan and even starts spying on them. She and Cody interact for the first time when Alejandro pushes Cody to the ground and Sierra yells his name in a worried way. At the end of the episode, when Sierra is in the confessional, she says that she is thrilled to have qualified for the third season of Total Drama next season because all of her questions about her on Cody's blog will be answered.

Total Drama: World Tour
The moment she notices Cody, Sierra begins to hyperventilate. She rushes to him and tells him that she had been dreaming of meeting him for a long time, only she imagined him shirtless, which seems to baffle her brown. She later shows that she knows a lot about him and helps him during the first challenge.

The two end up in different teams, but Sierra convinces Izzy to trade with her so that the redhead can be with Owen and she can be with Cody. Sierra starts rummaging through Cody's backpack and sniffing his stuff, until a lace slips into her nose. As the contestants rush in, and sing (reality rules require a song to be sung) Sierra hugs Cody, terrifying him. When Sierra and Cody discover they are paired up in the pinball challenge, she is very happy about it. As their pinball machine flies through the air, she clings to Cody in fear. During the challenge, Sierra kisses Cody many times and doesn't seem to care that her team has lost the first part of the challenge. In the second challenge, due to quarrels in their team, Cody and Sierra are forced to go through the second part of the challenge alone and in the end they win it. Sierra agrees with Gwen's claim that Cody's work is fantastic, and she decides to do a group hug, but doesn't allow the other girls to hug Cody.

Fanon
Coderra is a moderately popular ship. There are videos, fanfictions and fanarts dedicated to it and while it's not one of the most popular ships in fandom, it still has a good chunk of fans.

Fanfiction
Cody/Sierra tag on fanfiction.net

Wikis
Cody and Sierra on Total Drama Wiki