I'm not sure if Animal Crossing PAL supports progressive scan. I tested it for convenience and size.
PAL games all had the 480p display mode removed from them for no obvious reason. I've heard rumours that Godzilla managed to slip past Nintendo's apparent "be douchewads to Europeans" police, but can't confirm or deny that myself. Short version, though, always assume PAL games don't do 480p.
Will this force all games to progressive mode, even NTSC ones? If it does then I might try it out as I would love to play Skies of Arcadia in progressive mode.
Yes--or more accurately, it tries to, without any guarantee of success. I can confirm I-Ninja (NTSC) and Wario Ware (NTSC), both 480i-only games, can be forced to 480p flawlessly. However, I can also confirm that Bust-a-Move 3000 (NTSC)
doesn't work when forced to 480p, and Ultimate Spider-Man (NTSC) just reverts to 480i.
As mentioned, this patch uses the video mode forcing code from emu_kidid's Swiss, which isn't considered to be a completed endeavour and tends to have hit and miss compatibility. I've got Skies of Arcadia PAL, which throws a dramatic blue screen of death when forced to 480p on Swiss. This doesn't mean NTSC will do the same, but it's not a great sign.
It may not be entirely accurate to DML, but there's a
compatibility list for 480p-forcing on Swiss that should be a decent guide.