One of the things that makes it unique is the way it can explore the characters in a different way. In a normal 'My Babysitter's a Vampire' story, the focus might be on the more serious aspects like fighting vampires or dealing with the supernatural world. But in this tickle fanfiction, it can show a more humorous and intimate side of the characters. For example, it could show how the characters react to a tickle situation, which might reveal different aspects of their personalities that we don't usually see. It also gives the writer a chance to create really fun and unique scenarios that are based around this tickling idea, which is not something you see every day in fanfictions related to this show.
The uniqueness also lies in the fact that it caters to a very specific taste. Not all fans of 'My Babysitter's a Vampire' might be interested in tickle fanfiction, but for those who are, it offers a very specialized form of entertainment. It takes the familiar world of the show and twists it in a way that is both unexpected and engaging. The tickle element can also be used as a device to build relationships between the characters in a more light - hearted and unconventional way compared to the traditional storylines of the show, making it stand out as a very different and interesting take on the source material.