Literally almost anything's allowed. Hack prompts (Albeit poorly made ones), user prompts and etc. But you can't set your character as a user prompt, system prompt or turn on Not Battle (Not Battle didn't exist at the time) Character limit of 200 (Like the old days) Also please no {u} or {i} (They don't exist yet, but eh, I guess that's optional if you still want to use {u} and {i})