Well… there are many things, but I’ll try to shorten them as much as possible:
We have a Undertale genocide master, and you’ll often see his name: Flowey_the_memer. He’s quite a chill guy.
We have many OCs such as a Mask and Fish (me) a flaming bean called Flare (By Memez_cool), an Astro slime (by Astro-the-slime)… but I’m sure you get the idea.
We have a lot of wars: Temmie war, then a war which no one is allowed to talk about, then simping drama (I was involved in it) and people who were fun users leaving as well.