Temporarily disable HM use?

I have a small area inside of a map that the player can explore post-game (meaning they have all badges), but I don't want them to be able to use Surf while inside of this area. I figured that I could do this by temporarily taking away the badge that allows the player to Surf, but I realized that the HM system doesn't keep track of badges that way, it counts them instead. So taking away badge #4 when the player still has 7 means they can still surf, because 7 > 4.

Is there any other way I can temporarily disable the use of surf?

Bonus: I realize that by disabling surf the player can still teleport out of the area without passing through the event that re-enables surf, so I would need a way to disable teleport as well. The area is small, so it's unlikely that they will, but they still could.

Ypu can add a condition to these field moves that checks for a certain switch. If the switch is off the move can be used and if its on it can't be used

Thanks Ego13, I figured it out. I just put these lines just before the conditional statement that prompts the user to surf:


The no surf message was for testing purposes and isn't necessary.

EDIT: Slight correction, the "return false" line needs to be inside the if statement, otherwise the player will never be prompted to surf ever again. I fixed the code shown above.