A unique plot makes it stand out. For example, if it has a creative way of bringing Pokemon into the Twisted Wonderland world, like having a special Pokemon that can interact with the overblot phenomenon. Also, good character development is key. If the fanfic shows how the Pokemon influence the growth of the Twisted Wonderland characters or vice versa, it becomes more interesting.
Well, a standout 'Twisted Wonderland x Pokemon Fanfic' often has a strong emotional core. It could be about a Pokemon and a Twisted Wonderland character forming an unbreakable bond. This bond then drives the story forward, whether it's through facing difficult battles together or helping each other overcome personal struggles. It's not just about the crossover but about the relationships that develop within the crossover.
The way it combines the aesthetics of both worlds. If it can describe the Pokemon in the dark and magical setting of Twisted Wonderland in a vivid way. For instance, seeing a Charizard flying over the spooky Night Raven College. And if it can incorporate the unique features of Pokemon, like their types and abilities, into the challenges and solutions in Twisted Wonderland, that's a big plus.