KU-Cass Cartridge Resources Submit it to KU-Cass to raise the Data Hub level.

Game cartridges gathered and distributed by KU-Cass, a small robot active on the Black Shores. Some of the games are discontinued ones. These cartridges are sometimes given as awards in the Black Shores area. "Why the cartridges if we can make them digital?" "It's the tradition!"
Sources
Main Quest "To the Shore's End"
Yhoran's Tactical Trial