While not actually turbografx, I have to talk about it.
Got Crystal Beans: from Dungeon Explorer last night, and played through it. Got a really minty copy from Japan for pretty cheap, given how great of condition it is, and how badly I wanted it. For those who don't know, it is a port of Dungeon Explorer 2 to the Super Famicom. I'm a huge, huge Dungeon Explorer fan, so playing through this was awesome.
It is a really, really interesting port, given that the graphics are nearly identical, aside from the Chibi characters and town folk. I think one of the most interesting points is how the levels feel like they were bulk imported, because they are verbatim identical to DE2. However, a bunch of enemies were taken out, to the point that it feels unintentional, as if they didn't bother to make sure the import went properly. To that effect, I imagine some of the level designs would feel totally nonsensical if you hadn't played DE2. This is because there are wide open hallways with nothing to do, or weird wall formations that have nothing in them.
That said, I really enjoyed humming along with the tunes I know so well from DE2. If you are a fan of the series, this is a must own title, just for the absolute weirdness of the port. If you aren't thrilled with DE, then I would give this game a pass. Its a weaker version of Dungeon Explorer 2, and doesn't replace owning the original.