The Choroneko and Munna skin I found online on a Japanese site in PNG/BMP format, so I wasn't able to get the PSK format. PNG's don't work, so we have to use BMP images / PSK. Converting these PNGs to BMP lost the tile data.
PSKs have a tile format which can be seen in PokeSkinED, which is not preserved when converted to PNG. There's also a limited amount of colors to be used, which is why PSKs can be so much smaller in size but still have tile data.
PokeCGear has a problem outputting the images as well, as the furthest right pixel column is wrongly put on the left side.
also
We can't get the C-Gear skins to stick on the saves (the game says the skin is corrupted)...
tl;dr, need original PSK files from saves. You don't have to post the save file, just the ripped PSK.
It'd be nice to get a fresh psk for Choroneko and Munna