I eliminated some of your unknowns. Working on my own list too. 16,000 entries so far, 17 unknown. I'll keep you updated.
PBPX-95235 Ape Escape 3
PBPX-95518 zzz_unknown_02
PTPX-97038 (Probably not a real ID)
SCAJ-25040 zzz_unknown_04
SCES-53361 zzz_unknown_05
SCES-54147 zzz_unknown_06
SCKA-20088 zzz_unknown_07
SCPM-62115 zzz_unknown_08
SCPM-62116 zzz_unknown_09
SCPS-20039 zzz_unknown_10
SLAJ-25054 Sakura Wars 5 - Episode 0 - Wild Daughter of the Samurai
SLAJ-35002 zzz_unknown_12
SLES-51213 zzz_unknown_13
SLES-52615 zzz_unknown_14
SLKA-25260 zzz_unknown_15
SLKA-25314 zzz_unknown_16
SLKA-25402 zzz_unknown_17
SLPM-62024 Musou no Go (Cancelled)
SLPM-62089 Chiki Chiki Machine Mou Race: Black Maou & Kenken (Cancelled)
SLPM-65147 zzz_unknown_20
SLPM-65188 TransWorld Surf
SLPM-65351 Wandaba Style (DX Mix Pack)
SLPM-65814 K-1 Premium 2004 Dynamite!!
SLPM-66048 Oz
SLPM-68010 zzz_unknown_25
SLPS-20014 SSX Snowboard Supercross
SLPS-20049 The Flintstones in Viva Rock Vegas
Also, look at this:
PBPX-95517 ###Network Adapter Start-Up Disc v2.0$$$
PBPX-95518 ###(Unknown)
PBPX-95519 ###Network Adaptor Start-Up Disc v2.0$$$
In my list, when I order things by ID, things tend to get grouped. This suggests that PBPX-95518 is also "Network Adaptor Start-Up Disc v2.0". It's not proof, but knowing the probable name can help dig up info on the disc, maybe an image of the disc or an ad with the ID in the description. That's where you find the really obscure ID's.