Chunsoft's roguelike dungeon RPG Mystery Dungeon: Shiren the Wanderer 4 is making the trip over to PSP in Japan this October.

The game originally came out on Nintendo DS a couple of years ago, but now it's coming over to Sony's handheld as Mystery Dungeon: Shiren the Wanderer 4+. That all-important extra symbol is for the three new dungeons and Twitter support it brings with it, though just what it does with the social network isn't known right now.

There's no word yet on a release in the West. We wouldn't hold our breath given the series' past — but you never know.