How do I do it? The levels I add message blocks to won't show up on the list without some ASM work I heard, and I absolutely need to know so I can give directions in otherwise nearly impossible situations. If someone could give me a complete, not terribly hard to understand process, that'd be great.
The message blocks uses the message from the level on the overworld. E.G:
You start in level 105. You take a pipe to level A6, which has a message block in it. You hit the message block and it shows one of the messages for level 105.