I can confirm that Luigi's Mansion PAL black screen issue exists. I tried Luigi's Mansion PAL with forcing 480p and I had a black screen.In previous versions, forcing 480p to the game resulted in a ugly cropped screen with MASSIVE slowdown.
FIX94
There are 3 PAL (50hz) games in my knowledge that display in a cropped image when forced to 480p. Luigi's Mansion, Wave Race BS and Wario World .
Please, make something for them. It is really important for us Europeans residents to experience these first party games in a correct progressive mode after all these years.
And I mean it. Please...