Item Steals from Monsters
This list excludes the post-game and IAP dungeons. I may also have missed a few at the very start of the game (I’m not sure when I was able to steal).
Monster (Excluding Post-Game)
Location
Steal
Ghost
Old Highway
Eye Tincture
Giant Falcon
Old Highway
Healing Potion
Killer Wolf
Old Highway
Paralyze Heal
Earth Elemental
Imcinoa Cave
Paralyze Heal
Marionette
Imcinoa Cave
Seal Destroyer
Little Devil
Imcinoa Cave
Antidote
Old Atelier
Monstrous Bird
Antidote
Old Atelier
Serpent
Awakening Herb
Wolf
Hidden Lab
None
Slime
Hidden Lab
None
Cave Snake
Hidden Lab
Scope
Yellow Slime
Hidden Lab
Yellow Gel
Maneater
Hidden Lab
Potion
Caeneus
Hidden Lab
Magic Elixir
Aqua Elemental
Old Atelier
Water Rune
Roc
Old Atelier
Seal Destroyer
Imp
Old Atelier
Magic Tonic
Selalitte
Old Atelier
Mana Elixir
Killer Doll
Deep Path
Magic Tonic
Flame Spirit
Deep Path
Fire Rune
Bertolde
Deep Path
Cure All
Cerberus
Deep Path
Runed Orb
White Snake
Guild Cellar
Awakening Herb
Wind Elemental
Guild Cellar
Healing Potion
Guild Soldier
Guild Cellar
Sniper Choker
Illucifone
Guild Cellar
Elixir
Red Slime
Rikrit Ruins
Fire Rune
Cuchulain
Rikrit Ruins
Recall Crystal
Killer Fang
Rikrit Ruins
Magic Tonic
Rosenia
Rikrit Ruins
Titan's Elixir
Frost Plant
Ethonia Cave
Water Rune
Wraith
Ethonia Cave
Magic Tonic
Living Doll
Ethonia Cave
Soul Charm
Edwards
Ethonia Cave
Magic Ore
Guild Master
Guild HQ
Knight Circlet
Python
Guild HQ
Seal Destroyer
Gremlin
Guild HQ
Magic Tonic
Guild Officer
Guild HQ
Power Choker
Rosenia
Guild HQ
Secret Revive
Illucifone
Guild HQ
Strength Elixir
Spectre
Obsidian Way
Revive
Apsu
Obsidian Way
Mixed Potion
Glare Elemental
Obsidian Way
Grass of Life
Crystal Golem
Obsidian Way
Magic Ore
Berith
Obsidian Way
Elixir
Stolas
Wisdom Tower
Paralyze Heal
Andras
Wisdom Tower
Star Gem
Blob
Wisdom Tower
Purify
Selalitte
Wisdom Tower
Mana Elixir
Selalitte (transform)
Wisdom Tower
Runed Orb
Decarabia
Skyward Path
Crystal Chip
Hati
Skyward Path
Crystal Chip
Ose
Skyward Path
Crystal Chip
Garm
Skyward Path
Health Elixir
Caeneus
Skyward Path
Magic Ore
Death Knight
Imcinoa Cave
Mithril
Helflare
Old Highway
Health Elixir
Leraie
Rikrit Ruins
Mana Elixir
Astaroth
Ethonia Cave
Speed Elixir
Jormungand
Obsidian Way
Magic Elixir
Gelgraknir
Wisdom Tower
Strength Elixir
Cimeries
Void Trail
Revive
Focalor
Void Trail
Mixed Potion
Chaos Doll
Void Trail
Seal Destroyer
Gemini
Void Trail
Mithril
Smauge
Void Trail
Runed Orb
Edwards
Void Trail
Mana Potion
Edwards (transform)
Void Trail
nothing
Monster (Excluding Post-Game)
Location
Steal
Ghost
Old Highway
Eye Tincture
Giant Falcon
Old Highway
Healing Potion
Killer Wolf
Old Highway
Paralyze Heal
Earth Elemental
Imcinoa Cave
Paralyze Heal
Marionette
Imcinoa Cave
Seal Destroyer
Little Devil
Imcinoa Cave
Antidote
Old Atelier
Monstrous Bird
Antidote
Old Atelier
Serpent
Awakening Herb
Wolf
Hidden Lab
None
Slime
Hidden Lab
None
Cave Snake
Hidden Lab
Scope
Yellow Slime
Hidden Lab
Yellow Gel
Maneater
Hidden Lab
Potion
Caeneus
Hidden Lab
Magic Elixir
Aqua Elemental
Old Atelier
Water Rune
Roc
Old Atelier
Seal Destroyer
Imp
Old Atelier
Magic Tonic
Selalitte
Old Atelier
Mana Elixir
Killer Doll
Deep Path
Magic Tonic
Flame Spirit
Deep Path
Fire Rune
Bertolde
Deep Path
Cure All
Cerberus
Deep Path
Runed Orb
White Snake
Guild Cellar
Awakening Herb
Wind Elemental
Guild Cellar
Healing Potion
Guild Soldier
Guild Cellar
Sniper Choker
Illucifone
Guild Cellar
Elixir
Red Slime
Rikrit Ruins
Fire Rune
Cuchulain
Rikrit Ruins
Recall Crystal
Killer Fang
Rikrit Ruins
Magic Tonic
Rosenia
Rikrit Ruins
Titan's Elixir
Frost Plant
Ethonia Cave
Water Rune
Wraith
Ethonia Cave
Magic Tonic
Living Doll
Ethonia Cave
Soul Charm
Edwards
Ethonia Cave
Magic Ore
Guild Master
Guild HQ
Knight Circlet
Python
Guild HQ
Seal Destroyer
Gremlin
Guild HQ
Magic Tonic
Guild Officer
Guild HQ
Power Choker
Rosenia
Guild HQ
Secret Revive
Illucifone
Guild HQ
Strength Elixir
Spectre
Obsidian Way
Revive
Apsu
Obsidian Way
Mixed Potion
Glare Elemental
Obsidian Way
Grass of Life
Crystal Golem
Obsidian Way
Magic Ore
Berith
Obsidian Way
Elixir
Stolas
Wisdom Tower
Paralyze Heal
Andras
Wisdom Tower
Star Gem
Blob
Wisdom Tower
Purify
Selalitte
Wisdom Tower
Mana Elixir
Selalitte (transform)
Wisdom Tower
Runed Orb
Decarabia
Skyward Path
Crystal Chip
Hati
Skyward Path
Crystal Chip
Ose
Skyward Path
Crystal Chip
Garm
Skyward Path
Health Elixir
Caeneus
Skyward Path
Magic Ore
Death Knight
Imcinoa Cave
Mithril
Helflare
Old Highway
Health Elixir
Leraie
Rikrit Ruins
Mana Elixir
Astaroth
Ethonia Cave
Speed Elixir
Jormungand
Obsidian Way
Magic Elixir
Gelgraknir
Wisdom Tower
Strength Elixir
Cimeries
Void Trail
Revive
Focalor
Void Trail
Mixed Potion
Chaos Doll
Void Trail
Seal Destroyer
Gemini
Void Trail
Mithril
Smauge
Void Trail
Runed Orb
Edwards
Void Trail
Mana Potion
Edwards (transform)
Void Trail
nothing
Older, but not wiser