Cast of Characters: Main Unit
All characters are listed in the show's ending credits in the volume of lines. I am able to obtain who voiced each actor accurately in this way.
Max
Emmy
Cassie
Ord
Zak and Wheezie
Quetzal
Second Unit [in order of appearance]
Dr. Boobegone [from #104B 'Calling Dr. Zak', #130B 'Light my Firebreath']
Dragon in audience [from #111B 'Four Little Pigs']
Luna [from #114B 'Cassie Loves a Parade', #126A 'Crash Landings']
Sparkle [from #114B 'Cassie Loves a Parade', #126A 'Crash Landings']
Fernando [from #122A 'The Jumping Bean Express']
Polly Nimbus [from #129B 'Under the Weather']
Kiki [from #132B 'Baby Troubles']
Short-order Dragon [from #133B 'Roller Coaster Dragon']
Shopkeeper Dragon [from #134B 'Wild Time']
Priscilla [from #136B The Ugly Dragling']
Arlo [from #137A 'Out With the Garbage']
Spike [from #138A 'Bully For You']
Third Unit [not dragons, in order of appearance]
Big-Eyed Bird [from #101B 'The Forest of Darkness', #136A 'Ord Sees The Light']
Marmadune [from #102A 'To Kingdom Come']
Poozie [from #102B 'Goodbye Little Caterpoozle']
Adult Pony #1 [from #103A 'Knot A Problem']
Adult Pony #2 [from #103A 'Knot A Problem']
Baby Pony [from #103A 'Knot A Problem']
Sid Sycamore [from #103B 'Ord's Unhappy Birthday', #109A 'Emmy's Dream House', #112A 'Zak and the Beanstalk',
Dandelions [from #105A 'Pigment of Your Imagination' , #115B 'Max's Comic Adventure', #127B 'My Way or Snow Way',
Do-Re-Mi Birds [from #105B 'Zak's Song', #111B 'Four Little Pigs', #112A 'Zak and the Beanstalk',
Burping Rock [from #106A 'Snow Dragons']
Fury [from #106B 'The Fury is Out on This One']
The Giant of Nod [from #107A 'The Giant of Nod', #139B 'Much to do About Nodlings']
Nodlings [from #107A 'The Giant of Nod', #139B 'Much to do About Nodlings']
Doodle Fairy [from #105A 'A Picture's Worth a Thousand Words', #133A 'Small Time']
Talent Pool [from #108B 'The Talent Pool']
Slinky Serpent [from #110A,'Eggs Over Easy']
Baby Rhyme Bird [from #110A,'Eggs Over Easy']
Rhyme Bird [from #110A'Eggs Over Easy']
Capt. Scalawag [from #111A 'Sky Pirates', #138B 'The Great White Cloud Whale']
Hugh Mungus [from #112A 'Zak and the Beanstalk', #130B 'Light my Firebreath']
Cosmo [from #114B 'Cassie Loves a Parade']
Mondo Mouse [from #115B 'Max's Comic Adventure']
Giant [from #116B 'Staying Within the Lines', #128A 'Sand Castle Hassle']
Juggle Bug [from #117A 'Quibbling Siblings', #123B 'Sounds like Fun']
Boinger [from #117B 'Wheezie's Hairball']
Norm, the Number Gnome [from #118A "Follow the Dots']
Eunice [from #119A 'A Tall Tale']
Windy [from #120A 'Blowin' With the Wind']
Simon, the Game Gnome [from #121A "Do Not Pass Gnome"]
Woody, the Wooden Door [from #121B "Treasure Hunt"]
Jumping Beans [from #122A 'The Jumping Bean Express']
Squink [from #122B 'Get Offa My Cloud']
Squirrel [from #123A 'Backwards to Forwards', #131A 'Follow the Leader']
Sea Serpent [from #124A 'The Greatest Show in Dragon Land']
Dancing Crystals [from #124B 'Prepare According to Instructions']
Mr. Pop [from #125A 'Wheezie's Last Laugh']
Hoppy [from #125B 'Frog Prints', #136A 'Ord Sees The Light']
Nippy [#127B 'My Way or Snow Way']
Snow Puppy [from #127B 'My Way or Snow Way']
Turtle Dragons [from #128A 'Sand Castle Hassle']
Shelly Turtle [from #129A 'Zak Takes A Dive']
Miz Pink Tree Snail [from #130B 'Light my Firebreath']
Pooky [from #131A 'Follow the Leader']
Old Flying Carpet [from #131B 'Max and The Flying Carpet']
Magic Jump Rope [from #132A 'Rope Trick']
Shrinking Violets [from #133A 'Small Time']
Snake Dragon [from #133B 'Roller Coaster Dragon']
Ticket Gnome [from #133B 'Roller Coaster Dragon']
Magic Crayon [from #134A 'Bad ShareDay']
Songflowers [from #134B 'Whole Lotta Maracas Goin' On']
Cheddar [from #137B 'Lights, Camera, Dragons']
Cloud Whale [from #138B 'The Great White Cloud Whale']
Dragonocerous [from #139A 'To Do or Not To Do']
Glimmer [from #139A 'To Do or Not To Do']
Flutterby [from #140A "Don't Bug Me']
Musical Snake [from #140A 'Don't Bug Me']
Fourth Unit [Non-intelligent plants]
Star Seed [from #101B "Forest of Darkness, #136A 'Ord Sees The Light']
Giggle Flowers [from #108A 'A Picture's Worth a Thousand Words']
Jingle Flowers [from #112B 'A Feat on Her Feet']
Loud Flowers [from #125B 'Frog Prints']
Huggly-Snuggly Flower [from #131B 'Max and The Magic Carpet']
Fifth Unit [voice only]
Mom
Dad