Hello. I am a Demon item collector. If it has Demon in the name, I have it.
Usually.
I'm missing one item. Horns of the Demon. That is the only item I'm missing.
The items in red are items I am still missing. Strikeout items I have.

Demon Item Checklist:
Horns of the Demon
Demonic Pitchfork
Demonic Pendant
Guitar of Demona
Demonbow
Demonic Anklets [x2]
Demonic Earmuffs
Demonic Mood Bubble
Triple Demon Horns

Similar Items:
Wicked Car Horns [car]
Demonic Wings [car]
Nitemare Headband
Dark Halo [x2]
Devil Imp Plushie [donated]
CoCo Kitty Plushie
Devil Wings Back Tattoo
Devil Wing Arm Tattoo