Lilycove's hidden obstacle

[Team Pokemon]

In Lilycove, behind the house where you get a tm (rest I think), if you try to walk "under" the roof you will find an obstacle that does allow you to reach the shore. What is it?

[waltzh]

It's just the edge of a high ledge.

[Team Pokemon]

Maybe. But there no such edge anywhere else in the city. And by seeing the visible edge, you can understand there is something else there.

[waltzh]

Maybe the programmers made a sprite error for that block.

Maybe they put a block that looks like the one when you move 12 blocks to the left, and one block up from the point you cannot move any longer.

[dark_mon09]

its probably just a little mistake