Krerdly

Krerdly is the non-binary ship between Kris and Berdly from the Deltarune fandom.

Past
Very little is known about their past interactions. It is implied that Kris and Berdly have studied together since kindergarten. During the Undertale 7th anniversary stream, Berdly and Kris are shown to be gaming rivals. This is once again confirmed by favor text in chapter 2, mentioning they often play videogames together, that being Berdly’s favorite hobby and one of Kris’s interests.

Chapter 1
In Chapter 1, interactions between Berdly and Kris were minimal. Overall, Berdly acts arrogant and cocky towards them. When Noelle suggests that Kris joined their group project, he quickly disagrees with the idea. Though this is actually due to his insecurities rather than dislike for Kris, as shown later in Chapter 2.

Kris also appears to dislike Berdly at this point. If the player takes them to the hospital, where Rudy asks Noelle to bring Berdly by the window so he can throw something at him, Kris suggests to him that he should pass by the hospital.

However, by the end of the day, Berdly comments that he was getting worried about Kris and was glad that they were okay after being with Susie the whole day.

Fanon
The ship was pretty much nonexistent until Chapter 2, when it grew considerable popularity. It is usually seen accompanying Suselle shippers.

It is a running gag that people start shipping it ironically, as a crack ship, until it eventually grows on them.