The Item World is where you power up gear and hunt for (specialists).
Watch these guides for visual walkthroughs on early leveling and breaking into the post-game: Disgaea 1 BEST early leveling guide! YouTube · RPG Fanatic Disgaea 1 BEST beginner guide (breaking into post game) YouTube · RPG Fanatic The ULTIMATE Guide to Disgaea PC || Leveling + 100% Guide! YouTube · Mags Disgaea 1 Unlocking ULTIMATE class beginner guide YouTube · RPG Fanatic Disgaea 1 Complete Switch NSP (RF) (UPDATE)
Level a Male Warrior and a Male Martial Artist to level 5 to unlock the Thief. Though weak initially, they are essential for stealing high-rank gear and are required to unlock the powerful Majin class later. The Item World is where you power up