Well, in Baldi's Basics, you find yourself in a spooky school setting. Baldi is out to get you for some unknown reason. There are strange notebooks to collect and odd characters lurking around. It's a nerve-wracking experience with a story that keeps you on edge.
In general, creating fanfiction for 'baldi's basics x ddlc' can be appropriate as long as it is done within the boundaries of legality and good taste. Fanfiction often allows fans to explore different scenarios and relationships between characters from different works. But it should not violate any copyright laws or promote harmful or immoral ideas. For example, it should not contain excessive violence or inappropriate sexual content.
One idea could be to explore what would happen if the characters from Baldi's Basics were transported to a different, more modern school setting. They would have to deal with new technology and different teaching methods.
Definitely Baldi himself. He's the main character and his presence is essential for the 'baldi's basics' feel. Also, Playtime can add a creepy - cute element to the crossover. If it's a crossover with a superhero universe, someone like Spider - Man could be interesting. Spider - Man trying to figure out Baldi's math - filled world and using his web - slinging skills to avoid Baldi's wrath.
You could do a crossover with Minecraft. The blocky world of Minecraft could be invaded by Baldi and his pals. The Minecraft characters would have to use their building and survival skills to outwit Baldi and his strange rules.
The mystery in the game is a big factor. Fanfics can explore the unknown parts of Baldi's school, like the secrets behind the strange rules and the otherworldly nature of the place.
The protagonist from the game is often written about. Writers can put themselves in the shoes of this character and expand on their thoughts and feelings during their experiences in the strange school. They can also give the protagonist special powers or abilities to make their journey through the school more interesting.
There's this fanfic called 'Baldi's Redemption'. It delves into the idea of Baldi having a change of heart and trying to make the school a better place. It has some really cool interactions between Baldi and the students that make it a must - read for fans.