These are the lists of Rare items in aeRO Gaming. None of the monsters in game will drop any of these.
Emperor Wreath: 
Drooping Bunny: 
Virgo Diadem: 
Lunatic Hat: 
Sakura Coronet: 
Catfoot Hairpin: 
RWC 2008 Dragon Helm Gold: 
Tanigumi Girl Doll: 
Minstrel Song Hat: 
Book File Hat: 
YellowBunny Hairband: 
Dokebi Horn: 
Imp Hat: 
Sakura Mist Hat: 
Woe Elven Ears: 
Wild Rose Hat: 
Red Beret: 
Rice Ball Hat: 
Victory FB Hat: 
Love Dad Bandana: 
Savage Babe Hat: 
Sakura Milk Tea Hat: 
Champion Wreath: 
Piece Of White Cloth: 
E Kettle Hat: 
Shark Hat: 
Statue Of Baby Angel: 
Pinwheel Hat: 
Kafra Band: 
Large Hisbiscus: 
Driver Band: 
Fools Day Helmet: 
Baby Dragon Hat: 
Selendang: 
Rune Circlet: 
Hyuke's Black Cat Ears: 
Ice Wing Ear: 
Small Devil Horns: 
Pop Corn Hat: 
Red Wing Hat: 
Pink Night Cap: 
White Musang Hat: 
Magnolia Hat: 
Cute Green Ribbon: 
Brazil Twin Ribbon: 
Filir's Pinions: 
Muslim Hat M: 
Sprout Hat: 
Kwati Hat: 
Heart Eyepatch: 
Mischievous Fairy: 
Mosquito Coil: 
Noah Hat: 
Gemini Diadem: 
Snake Head Hat: 
Hawk Eyes: 
Turtle_Hat: 
Kerchief: 
Bogy Cap: 
Gold Angel Sculpture: 
Classic Hat: 
Red Dress Hat: 
Fairy Flower: 
Chicken Hat: 
Poring Cake Hat: 
Triangle Rune Cap: 
Shadow Crown: 
Shower Cap: 
Shaman_Hat: 
Voyage_Hat: 
Silver Tiara: 
Bride's Corolla: 
Purple Cowboy Hat: 
Flower Hat: 
Ears Of Ifrit: 
Evil Snake Lord Hat: 
Wind Milestone: 
Necktie: 
Mercury Riser: 
Twin Santa Hat: 
Aries Crown: 
Hat Of Fortune: 
Ribbon Of Life: 
Red Hat: 
Decorative Geographer: 
Burning Spirit: 
Aquarius Diadem: 
Cute Blue Ribbon: 
Rudolph Santa Hat: 
Blue Night Cap: 
Peco Ears: 
Carnival Circlet: 
Filir Hat: 
Angel Spirit: 
Sagittarius Diadem: 
Green Ribbon: 
Amistr Cap: 
Rasta_Wig: 
Pirate's Pride: 
3D Glasses: 
Linguistic Book Hat: 
T Sunglasses: 
Ship Captain Hat: 
Darkness Helm: 
Peacock Feather: 
Sailor's Bandana: 
E Drooping Bunny: 
Frog King Hat: 
Power Of Thor: 
Magic Stone Hat: 
Jasper Crest: 
Red Ph.D Hat: 
Freya's Crown: 
Striped Hat: 
Cancer Diadem: 
Raven Cap: 
Grief for Greed: 
Ph.D Hat V: 
Red Minstrel Hat: 
Jumping Poring: 
Pizza Hat: 
Aquarius Crown: 
Remover Hat: 
Hairband Of Reginleif: 
Carmen Miranda's Hat: 
Holy Marching Hat: 
Passion FB Hat: 
Nipper Crab Hairpin: 
Red Tailed Ribbon: 
Musketeer Hat: 
I Love China: 
Green Bunny Hairband: 
Pecopeco Hairband: 
Drooping Boto: 
Cola Can: 
Blue Ribbon: 
Midas Whispers: 
Freyja SCirclet30: 
Scuba Gear: 
Golden Crown: 
Drooping Morocc Minion: 
Black Cat Ears: 
Bijofnil Wings: 
Dolor Hat: 
Academy Completion Hat: 
RJC Katusa Flower: 
Bandit Hat: 
Leaf Cat Hat: 
Poring Cake Hat: 
3D Glasses: 
hawk Eyes: 
Ancient Elven Ear: 
Brazil Beret: 
Side Cap: 
Hair Brush: 
Frog Hat: 
Virgo Crown: 
King Tiger Doll Hat: 
Beer Hat: 
Desert Prince: 
Driver Band: 
Chung Hairband: 
Witch's Pumpkin Hat: 
Love Chick Hat: 
Evolved Dragon Skull Hat: 
Brazilian Flag Hat: 
Crown of Ancient Queen: 
Scooter Helmet: 
Hermode Cap: 
Academy Freshman Hat: 
Black Tea Kochakaden Hat: 
Moon Rabbit Hat: 
Octopus Hat: 
Luxury Hat: 
Persika: 
Navy Beret: 
Camp Fire Hat: 
Horn of Ancient: 
Red Navy Hat: 
AFK Hat: 
Eden Team Hat: 
Red Pirate Banada: 
Bullock Helm: 
Solar Hat: 
Sigrun's Wings: 
Leo Crown: 
Neko Mimi Kafra: 
Classic Hat: 
Cool FB Hat: 
Pirate Eye Bandage: 
Taurus Crown: 
Eye Of Juno: 
Magic Rabit Hat: 
Majestic Evil Horns: 
Mosquito Coil: 
Anniversary Hat: 
Wispers of Wind: 
PinkBunny Hairband: 
Magic Rabbit Hat: 
Glory FB Hat: 
Dice Hat: 
Fanta Zero Lemon Hat: 
Cat Ear Beret: 
RWC 2008 Dragon Helm Silver: 
Sting hat: 
Fanta Orange Can Hat: 
Karada Meguricha Hat: 
RTC Second Place: 
Black Musang Hat: 
Crown Parrots: 
RTC First Place: 
Holidays Hat: 
Evil Snake Lord Hat: 
Woe Crown: 
Legionnaire Hat: 
Gryphon Hat: 
F Magic Eyes: 
Mitra: 
Eye Of Darkness: 
Golden Laurel: 
Libra Crown: 
Blazing Sun: 
Dragon Skull: 
Shining Electric Bulb Hairband: 
Shaman Hat: 
Blush of Groom: 
Sea Cat Hat: 
Black Tail Ribbon: 
Puppy Hat: 
Tam: 
Woe Sahkkat: 
Louyang NewYear Hat: 
Flower Crown: 
Tendrilion Hat: 
Helm Of Abyss: 
Baphomet Horns: 
Skull Cap: 
Victory Hairband: 
Sunflower Hairpin: 
Sloth Hat: 
Orchid Hairband: 
Red Bunny Band: 
Fanta Grape Can Hat: 
Parade Hat: 
Poring Cake Hat: 
Shaman's Hair Decoration: 