These are the lists of Rare items in aeRO Gaming. None of the monsters in game will drop any of these.
Twin Santa Hat: 5488
Sea Cat Hat: 5692
Octopus Hat: 5554
Poring Cake Hat: 5590
Aries Crown: 5546
Bandit Hat: 5491
Tam: 5379
Evolved Dragon Skull Hat: 5460
Striped Hat: 5395
Gryphon Hat: 5660
Moon Rabbit Hat: 5457
Dragon Skull: 5292
Tanigumi Girl Doll: 5526
Passion FB Hat: 5856
Crown Parrots: 5417
Ancient Elven Ear: 5786
Shark Hat: 5508
Academy Freshman Hat: 5406
Scooter Helmet: //5656
Fanta Zero Lemon Hat: 5522
Holidays Hat: //5484
Pecopeco Hairband: 5286
Hermode Cap: 5481
Gold Angel Sculpture: //5769
Poring Cake Hat: 5415
E Kettle Hat: //5717
Necktie: 5442
Chung Hairband: //5609
Ship Captain Hat: 5359
Leaf Cat Hat: 5555
Cute Green Ribbon: 5438
Savage Babe Hat: 5572
Brazil Beret: //5601
Pizza Hat: 5499
Champion Wreath: 5320
Academy Completion Hat: 5407
Golden Crown: 5666
Catfoot Hairpin: 5446
Lunatic Hat: 5527
Eden Team Hat: 5583
Blue Night Cap: 5506
Ph.D Hat V: 5810
Freya's Crown: 5306
Noah Hat: //5759
Cool FB Hat: 5857
F Magic Eyes: //5639
Burning Spirit: //5754
Taurus Crown: 5550
Cancer Diadem: 5581
3D Glasses: 5794
Sting hat: 5509
Bijofnil Wings: 5480
Freyja SCirclet30: 5541
Brazil Twin Ribbon: 5600
Gemini Diadem: 5569
Dokebi Horn: 5573
Classic Hat: 5815
Blazing Sun: //5776
Sakura Milk Tea Hat: 5524
Grief for Greed: 5021
RWC 2008 Dragon Helm Silver: 5452
Victory FB Hat: 5858
Baby Dragon Hat: //5531
Hat Of Fortune: //5465
Green Ribbon: 5681
Chicken Hat: 5431
Decorative Geographer: 5455
Louyang NewYear Hat: 5392
Jumping Poring: 5335
Book File Hat: 5827
Large Hisbiscus: 5311
Mischievous Fairy: 5402
Pop Corn Hat: 5413
Drooping Bunny: 5459
Black Cat Ears: 5057
Brazilian Flag Hat: 5477
Driver Band: //5760
Luxury Hat: 5558
Shaman Hat: 5665
Bride's Corolla: 5436
Black Tail Ribbon: //5765
Holy Marching Hat: 5654
Rune Circlet: //5746
Wind Milestone: //5466
Horn of Ancient: 18595
Fanta Grape Can Hat: 5425
Fanta Orange Can Hat: 5424
Glory FB Hat: 5859
Drooping Boto: //5779
Sakura Mist Hat: 5523
Eye Of Juno: //5595
Flower Hat: 5525
Sailor's Bandana: 5691
Shaman_Hat: //5841
Beer Hat: 5416
Aquarius Diadem: 5512
Turtle_Hat: //5611
Evil Snake Lord Hat: 5364
Orchid Hairband: 5370
Pinwheel Hat: 5458
Sagittarius Diadem: //5740
Karada Meguricha Hat: 5426
Driver Band: //5749
hawk Eyes: 5516
Angel Spirit: 5389
Magic Rabit Hat: 5503
Statue Of Baby Angel: 5443
Fools Day Helmet: //5847
Majestic Evil Horns: 5584
Sigrun's Wings: 5592
Scuba Gear: 5397
Mercury Riser: 18597
Selendang: 5355
Power Of Thor: 5495
Blush of Groom: 5800
YellowBunny Hairband: //5783
Linguistic Book Hat: 5422
Hawk Eyes: 5517
Helm Of Abyss: 5363
Silver Tiara: 5261
Evil Snake Lord Hat: //5655
Blue Ribbon: 5404
Hairband Of Reginleif: //5471
Peco Ears: 5358
Shower Cap: 5510
Neko Mimi Kafra: 5387
Desert Prince: //5591
Virgo Diadem: //5599
Golden Laurel: 5433
Rice Ball Hat: 5575
Filir Hat: 5405
Raven Cap: 5530
Snake Head Hat: 5388
Frog Hat: 5447
Purple Cowboy Hat: 5409
RTC Second Place: 5604
Minstrel Song Hat: //5751
Pink Night Cap: 5507
Legionnaire Hat: 5418
Small Devil Horns: 18503
Navy Beret: //5773
Hair Brush: 5444
Cat Ear Beret: 18600
Victory Hairband: 5301
Cute Blue Ribbon: 5440
Fairy Flower: 5437
Magic Rabbit Hat: 5561
Bogy Cap: 5429
White Musang Hat: 18612
Bullock Helm: 5560
Cola Can: //5434
Darkness Helm: 5653
Virgo Crown: //5598
Solar Hat: 5450
Filir's Pinions: 5664
Black Musang Hat: 18613
Woe Sahkkat: //5830
Peacock Feather: 5519
3D Glasses: 5788
Ice Wing Ear: //5610
Amistr Cap: //5766
Sakura Coronet: //5768
Red Navy Hat: //5772
Poring Cake Hat: 5487
Muslim Hat M: 5354
Anniversary Hat: 5486
Black Tea Kochakaden Hat: 5427
Puppy Hat: 5454
Wispers of Wind: //5756
Leo Crown: //5588
Skull Cap: 18539
Aquarius Crown: 5513
Midas Whispers: //5752
Tendrilion Hat: //5780
Witch's Pumpkin Hat: 18656
Carmen Miranda's Hat: 5307
Camp Fire Hat: 5414
Sunflower Hairpin: 5103
Red Dress Hat: //5795
Pirate's Pride: 5501
Parade Hat: //5468
Red Pirate Banada: //5661
Imp Hat: 5658
Eye Of Darkness: //5470
Emperor Wreath: 5533
Magic Stone Hat: //5753
Red Hat: //5472
Pirate Eye Bandage: 5804
Jasper Crest: 5396
Mosquito Coil: 5587
Red Wing Hat: 5690
Rudolph Santa Hat: 5742
Wild Rose Hat: 5557
Sprout Hat: 18596
I Love China: 5423
Piece Of White Cloth: 5559
Dice Hat: 5496
Shaman's Hair Decoration: 5479
Woe Elven Ears: //5840
AFK Hat: //5474
Libra Crown: //5662
Mitra: //5747
King Tiger Doll Hat: 5497
Red Ph.D Hat: //5813
Frog King Hat: 5528
Magnolia Hat: 5365
Woe Crown: //5834
Red Beret: //5580
Side Cap: 5535
Shining Electric Bulb Hairband: 5310
Dolor Hat: //5563
Heart Eyepatch: 18620
Red Minstrel Hat: 5435
Red Bunny Band: //5763
Ribbon Of Life: 5793
Classic Hat: 5478
Baphomet Horns: 5683
Mosquito Coil: 5586
RWC 2008 Dragon Helm Gold: 5451
Ears Of Ifrit: 5421
Hyuke's Black Cat Ears: 5360
Sloth Hat: //5761
RTC First Place: 5603
Carnival Circlet: 5819
Kwati Hat: 5537
E Drooping Bunny: //5716
Love Chick Hat: 5822
Kerchief: 5322
Rasta_Wig: //5571
Triangle Rune Cap: 5682
Red Tailed Ribbon: 5801
Remover Hat: //5777
T Sunglasses: 19504
Nipper Crab Hairpin: //5473
Persika: 5781
PinkBunny Hairband: //5784
RJC Katusa Flower: 5547
Crown of Ancient Queen: 5080
Flower Crown: 5303
Voyage_Hat: 5578
Shadow Crown: //5750
Drooping Morocc Minion: 5671
Kafra Band: 5020
Green Bunny Hairband: //5785
Love Dad Bandana: 5366
Musketeer Hat: //5469