Sony PlayStation GameShark Updates - Undumped Discs
From Redump Wiki
Full list of known discs here: Sony PlayStation GameShark Updates - List
Undumped
Europe
Game Champion: Platinum Collection 1 (Presumed to exist) Game Champion: Platinum Collection 2 (Presumed to exist) Game Champion: Platinum Collection 3 [1]
Japan
KRTDD-003 Action Replay Higi Code CD アクションリプレイ 秘技コードCD Taikenban, Bundled with Pro Action Replay
Also check the Unlicensed PSX lists:
http://wiki.redump.org/index.php?title=Sony_PlayStation_-_Asia_Undumped_Discs#Unlicensed
http://wiki.redump.org/index.php?title=Sony_PlayStation_-_PAL_Undumped_Discs#Unlicensed
http://wiki.redump.org/index.php?title=Sony_PlayStation_-_USA_Undumped_Discs#Unlicensed