Fuse a persona during the fusion forecast "Skill Change". Effects = 1/2 HP gone from enemies. Light.
Hell Judgement
Fuse a persona during the fusion forecast "Skill Change". Effects = 1/2 HP gone from enemies. Dark.
Izanagi-no-Okami
In New Game + a new fusion section becomes available allowing you to fuse Izanagi-no-Okami.
Metal Bat
After reaching 19 Social Links, visit the Velvet Room and Margaret will award you the Metal Bat.
New Game +
Beat the game once to unlock New Game + mode.
Secret Weapons
To unlock these weapons you must return to dungeons you've already beat and defeat the extra boss that appears.
Kanji's Secret Weapon - Defeat the extra boss in Steamy Bath House
Kuma's Secret Weapon - Defeat the extra boss in Opera House
Main Character's Secret Weapon - Defeat the extra boss in Void Quest
Naoto's Secret Weapon - Defeat the extra boss in Secret Lab
Yousuke's Secret Weapon - Found in the boss's den in Mysterious Shopping Street
Yukiko's Secret Weapon - Defeat the extra boss in Yukiko's Castle
The Reaper
Go to Magatsu Inaba in 2nd playthrough and open the regular treasure chests there (not the golden ones) , easier to find in Magatsu Inaba.
Ultimate Weapons
In a New Game +, you will sometimes be given the option whether you want to open treasure chests or not. This choice means Death lurks within. Choose to open the chest and defeat Death and he'll drop an Ultimate Weapon for each character.