Wanted to bring this up because of the massive pain in the a** that DC is when it comes to indexing, leading to errors. Hope Redump becomes the best DB avaliable when we finish the fullset.
Lets take this case that i found on the Wiki (thanks for the guy that update all my work over regional releases, thank you so much for finishing and fixing the complete Pal Wiki):
South Park: Chef's Luv Shack , already dumped by JhMiller, in this case, real serial is T-8105D-50.
While T-8105D-50 is the only existing Serial ID over this game on Europe (pretty much sure because this game never got translated from english to other language in any platform), we can find that on Germany or Spain/Italy, new serial IDs can be found, as the Wiki showed (i already delete them):
South Park: Chef's Luv Shack (Es, It?) [T-8105D-13] - 3455198319057
South Park: Chef's Luv Shack [T-8105D-18] - 3455198319033
I confirmed Germany (T-8105D-18 in the cover) to have the ID disc as T-8105D-50 --> Proof on this eBay post:
I advice dumpers to always check Cover ID and Disc ID serials to not fall into the trap. Adding this info on the game profile is really useful too, as already known databases outside Redump still shows on different games's profile this kind of problems or lack of info about different ID Serials.
So, some of the games missing could be just different Cover ID variations, but the disc contents should match Europe dump as well as the Serial ID writen in the face of the disc.
For real, i wonder why Sega had to use such a stupid system and not even build or release a correct index database for users...
EDIT: Another case, Star Wars: Episode I: Jedi Power Battles with T-23002D-50 serial.
T-10004D-18 for German cover
T-13007D-05 for Spain cover
The Nomad Soul with T-36805D-61 serial
T-36805D-60 for Spain cover
T-36805D-05 for UK cover