I know I'm missing sources here, I just don't know where to look. Any help would be appricated!! ^^;

I spy Dokuro from Bokusatsu Tenshi Dokuro-chan, Chocolat Meilleure from Sugar Sugar Rune, and Harukaze Pop from Ojamajo Doremi(I think)
@A@

I see Yadamon from "Yadamon", Fine and Rein from "Fushigiboshi no Futagohime", My Melody & Yumeno Uta from "Onegai My Melody" & Yukimori Ringo from "Hime Chen! Otogi Chikku Idol Lilpri" ^^

Hi! I did a few searches and found almost every character on the picture. I can upload a small picture somewhere else showing those I didn't find if needed :)

Here's the list (beware, it's rather long):
Karin Hanazono From Kamichama Karin
Full Moon / Mitsuki Koyama From Full Moon wo Sagashite
Himeno Awayuki From Pretear
Maron Kusakabe / Kaitou Jeanne From Kamikaze Kaito Jeanne
Ririka Moriya / Nurse Angel From Nurse Angel Ririka SOS
Momoko Hanasaki / Wedding Peach From Wedding Peach
Arusu From Mahou Shoujo Tai Arusu (Alternate Title: Tweeny Witches)
Sasami Kawai / Pretty Sammy From Magical Girl Pretty Sammy
Licca Kayama / Doll Licca From Super Doll Licca-chan
Yui Kasuga / Corrector Yui From Corrector Yui
Miho Shinohara / Fancy Lala From Fancy Lala
Princess Silver From Yume no Crayon Oukoku
Potpourri From Fushigi Mahou Fun Fun Pharmacy (Anime News Network state Popuri instead)
Sae Sawanoguchi From Mahou Tsukai Tai
ChaCha From Akazukin ChaCha
ChaCha / Magical Princess From Akazukin ChaCha (both her normal and transformed form are on the pic)
Mary Bell From Flower Witch Mary Bell
Himeko Nonohara From Hime-chan no Ribbon
Karin Kokubu From Super Pig
Minky Momo From Magical Princess Minky Momo
Yuu Morisawa / Creamy Mami From Magical Angel Creamy Mami
Mai Kazuki / Magical Emi From Mahou No Star Magical Emi
Nagisa Misumi / Cure Black From Futari wa Pretty Cure
Honoka Yukishiro / Cure White From Futari wa Pretty Cure
Love Momozono / Cure Peach From Fresh Precure!
Saki Hyuuga / Cure Bloom From Pretty Cure Splash Star
Mai Mishou / Cure Egret From Pretty Cure Splash Star
Sasami Iwakura From Sasami: Magical Girls Club
Lunlun / Angel From Hana no Ko LunLun
Persia Hayami From Magical Fairy Persia
Lalabel From Mahou Shoujo Lalabel
Sally From Magical Witch Sally
Chappy From Mahou Tsukai Chappy
Mako From Mahou no Mako-chan
Limit From Miracle shoujo Limit-chan
Megu From Majokko Megu-chan
Tickle From Majokko Tickle
Nina Sakura From Ultra Maniac
Comet From Cosmic Baton Girl Comet-san
Meirin Kanzaki / Dr. Rin From Dr. Rin ni Kiitemite!
Ureshiko Asaba / Agnès From Okusama wa Mahou Shoujo
Merumo (or Alt. Melmo) From Fushigi na Merumo (Alternative: Marvelous Melmo)
Mint From Mahou no Angel Sweet Mint
Yumi Hanazono From Magical Idol Pastel Yumi
Punie Tanaka From Dai Mahou Touge
Ecchan From Sarutobi Ecchan
Akko From Himitsu no Akko-chan
Ink Nijihara / Pastel Ink From Moetan
Komugi Nakahara From Nurse Witch Komugi

Some corrections to do:
It's Doremi Harukaze, not Pop Harukaze the girl from Ojamajo Doremi in the picture
It's Hikaru Shidou From Magic Knight Rayearth (her name wasn't complete)
Saint Tail is Meimi Haneoka, From Saint Tail
Yukimori Ringo / Snow White, From Hime Chen! Otogi Chikku Idol Lilpri
Dokuro Mitsukai, From Bokusatsu Tenshi Dokuro-chan
Honey Kisaragi / Cutie Honey, From Cutie Honey
Tsubomi Hanasaki / Cure Blossom, From Heartcatch Precure!
Erika Kurumi / Cure Marine, From Heartcatch Precure!
Nozomi Yumehara / Cure Dream, From Yes! Pretty Cure 5

I hope this helps :D

O-O You're awesome! Thank You!!