Forgotten Cave

The Forgotten Cave is a strange secret area in PMU that I happened to stumble across. It doesn't seem to have an entry in the wiki so here I am. This cave is almost directly under the "Pink Wall", which is located in Expel plains west of Loch Lenile. You need a pokemon that can cross water in order to access it. Inside the cave it seems to be abandoned and quite boring. The only interesting feature is some old furniture, cobwebs, and a barricaded entryway that can be inferred to lead to the "Pink Wall". Since the forgotten cave is underneath it there is a good chance they are related in some way. In order to enter the cave you must walk into the mouth of the cave where the river is flowing from.