How did they work again? I'm fairly certain you needed boss flags, and a secret to trigger on the original screen to be carried over to the other. It's not working :shakeno:
Room state carry-overs
In 2.10 or later? Because in 2.10 it's like how you said, but later on it's much easier.
RSCO's in the betas only require permanent secrets in both rooms.
I'm using 254, and thanks! I'll go try it out.