DEMON GAZE II (EP)

This trophy is for collecting all 25 skulls in the game, and turning them in to Prometh, thus completing her quest. There are actually 26 skulls in the game, but only 25 are actually needed for the quest and trophy. Skulls are well hidden in dungeons. Skull locations can be revealed by treasure maps that enemies drop, but it’s not necessary to collect the maps in order to collect skulls. Here are the location of the skulls:

666th Avenue

Restricted Back Alley
X17 Y11
Goblin Road
X10 Y16
Junk Trade District
X07 Y02

Star Temple

2nd Class Charnel House
X04 Y08
Old Royal Tomb
X11 Y08
Handmaid's Grave - South
X03 Y09

Dragonwood Park

Myriad Regrets
X13 Y04
Abrupt Troubles, Act 1
X05 Y11
Separation Anxiety, Act 2
X11 Y04
Separation Anxiety, Act 3
X06 Y03

Hangar Prison Pavillion

Prison Pavillion B3F
X17 Y05
Prison Pavillion B1F
X17 Y17
Prison Pavillion B4F
X11 Y16

Hanger Prison Main Ward

Prison Main Ward B4F
X10 Y16
Prison Main Ward B2F
X18 Y11
Prison Main Ward B1F
X04 Y11

Pirate Graveyard

Entrance
X03 Y02
Pirate Ship Graveyard
X03 Y03
Den of Misfits
X10 Y02
Deep-Sea Creature
X10 Y13

Asteria Castle

Stairway block 1F
X01 Y18
West Block 1F
X16 Y04
East Block 1F
X13 Y10
West Block 2F
X06 Y11
Central Block 2F
X14 Y08
Wounded Star Domain 1
X06 Y07

Thanks to iku for the corrections and information about the extra mushroom.