Here is the Earth Kingdom list. And it's long... so loooooong.
Ecological Entities of the Earth Kingdom:
Armadillo Bear: Okay, that's awesome. Brute with an encounter power that gives it a high defense for a short time.
Armadillo Wolf: Aw yeah! Again, I think these would be good Skirmishers. They could have a sort of "Wolf Mode" where they move around and bite, or a "Armadillo Mode" where they curl up and roll over their enemies, get three of them employing different tactics and you've got a fight on your hands.
Armadillo Lion: Okay, so it's the third Armadillo + Something, but that doesn't mean it's redundant. These kids are Lukers. You know what that means! All Armadillo Hybrid encounter!
Badgermole: These guys invented Earthbending. They are also HUGE and blind. As far as role, say the first one is an Elite Lurker, the second one is a Solo Leader Soldier?
Blue Jay: These guys invented Featherbending, but Featherbending sucks so no one does it and no one cares.
Bear: Our first unique creature, the Earth Kings bear is a sort of once in a Campaign encounter, like the Tarrasque, or Orcus.
Bearded Cat: These guys are great. I want one. Make 'em a Familiar!
Boarcupine: I was really hoping these guys would be our first Artillery monster, but they pretty much just charge over and over again. I'm gonna call Skirmisher, but a tough one, cause one of these dudes almost took Appa down. They have some defensive abilities. Also, babies, there should be stats for the babies.
Bull Pig: These guys are wicked metal, two tusks, two horns, all badass. Since the Boarcupine already exists, I'm going to call Brute.
Buzzard-Wasp: Okay, they are giant wasps, they live in hives, I don't know... Lurker? Maybe one kind could Lurk, another kind could be a Soldier. I'm going to say they are caste-based.
Cabbage Slug: We have to include these guys, otherwise the upcoming Cabbage Merchant class won't have any weaknesses.
Camelephant: Aawwwwwwwwwwwwwwwwwwwww... I don't want to fight one! I want to ride one. Definitely a mount. Probably a Brute.
Canyon Crawler: So Lurker it hurts. They say these guys are spider-alligators, but think they are spider ants.
Cat: Fluffy white cat with green eyes. Probably an Epic level threat.
Cat Owl: It's a flying cat! That's... that's it. Familar? Maybe...
Catgator: Goodie, something aquatic. These guys rock, but they are also surprisingly nice animals. Stingy Quills for a secondary attack? Lurkers.
Chameleon: These are so lame, they don't even get a page on the Avatar Wiki. 'Nuff said.
Chicken: These are just a rip-off the Arctic Hen.
Dragonfly: They're bugs
and dragons! YAY! They also have three heads... yay? Familiar? Low level Skirmisher? Maybe they should come in swarms.
Duck: I have no idea what this is a cross between. Maybe a sheep and a labrador retriever?
Eel Hound: "Nothing runs faster over land or swims quicker than a giant Eel Hound", mounts all the way. These things are so fast, they serve as a late-game
Deus-Ex-Machina in the show.
Elbow Leech: Enormous leech, attaches only to elbows. Ha ha... what?
Elephant Koi: These are giant fish. Like GI-ANT. We're talking Large Whale to Small Leviathan here. Also, you can ride them like Free Willy. Awesome.
Elephant Mandrill: I don't know, this might be cool, but I can't think of anything other than an ability that involves a giant, shiny, red butt.
Elephant Rat: I know what you're thinking "Is it a giant rat or a tiny elephant?" Well the answer is... neither... it's a normal rat with a trunk and I hate it for being so disappointing.
Fox Antelope: These look exactly like Antelope. Again, disappointing.
Gemsbok Bull: If you've never heard of a Gemsbok, think Ibix, if you've never heard of an Ibix, think giant ****ing Antelope. Brute, but they should always appear in herds.
Gharial Hog: It's like a pig-o-gator. I don't know, at this point I'm getting totally callous to this nonsense.
Giant Beetle: These already exist in, like, every edition of DnD ever. It's a giant Rhinocerous Beetle, it should be able to toss someone like an evil seesaw. It's also a mount, wait... that's starting to sound cool.
Giant Fly: Okay, you know what I'm noticing? Any animal that people eat turn out to be super lame as a monster. Oh, did I mention these are harvested for food? They are? By magical Hillbillies.
Giant Night Crawler: This could be cool. A regenerating Lurker that burrows and can split into two minions when it dies.
Gilacorn: These are great. They are basically just lizards, but they steal ****. They should be included in an encounter with something big, so while the party is distracted the come up and take your ****. I'm gonna call Controller on this one, since it can disarm a PC for a little while.
Glow Fly: What? Another one? Really? Okay, what's different about this bioluminescent insect? It's tiny but it can glow so brightly that it blinds you and it induces hallucinations in people who look at it? Oh. Well that's awesome. Also a Controller.
Gopher Bear: It's a bear, but it can tunnel underground. Yes folks, they like bears and armadillos in this show. A lot. Lurker.
Gorilla Goat: Wow. That's awesome. No seriously. It's a gorilla that can climb on/eat anything. It's great. I think we should include a Soldier and an Artillery subtype. The first one tears people in half, the other one is smaller and throws stuff form high places.
Hippo: This is another one of the animals that makes me think the creators were on drugs. I mean... what in the world?
Hybrid Pigs: Some of them look like sheep, some look like cows. I think they should get a spot just for being so silly. Also, chicken-pig.
Hog Monkey: Another animal that deserves Artillery status. They should probably be able to squeal as an attack as well as climb and hurl objects.
Hopping Llama: It's a Llama that jumps really high. Skirmisher, maybe a mount, if you are up to it.
Jackalope: Okay, this thing is great. I think they should be Brute Minions, like they have some awesome charge attack, but they are basically just rabbits. It will surprise your party the first time it happens.
Leech-A-Pillar: These would have to come in swarms, but why bother, we already have Hopping Llamas.
Meadow Vole: D'AAAWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW!
Ostrich Horse: Another kooky mount. I liked it better when it was called a Chocobo.
Platypus Bear: (There should just be a section of the book devoted to things that are also bears.) Okay, little known facts about Platypi, 1: They have venom secreting barbs in their back feet, and their venom is apparently one of the most painful in the animal kingdom. 2: They hunt with sonar. 3: The only reason they don't rule the earth is cause they aren't the size of a bear OOOOOOOOOOSHHIITT! Two kinds, the
Venompaw Platypus Bear, which is a lurker that comes up and is like STINGPOWER and the other is like some sort of
Duckbill Killtypus that is all like MAUL and is probably a soldier.
Poodle Monkey: No! Bad Poodle Monkey, go to your box, naughty, naughty Poodle Monkey! Get out of here!
Possum Chicken: I don't know... like... a chicken that hangs upside down.
Purple Pentapus: Okay, all we know is that these are adorable and when you put them on your skin the make it look like you have the plague. If they go in the book, they should get a baby version and a adult version and those should come as a package feature. Maybe the babies are minion controllers that stick to you and keep you from doing stuff and the adult is a Leader Artillery that attacks people who have little Pentapuses on them.
Pygmy Pumas: These are basically tiny Sabretooth Tigers.
Quilled Chameleon: These are Chameleons but, get this, they have quills! Or feathers... or... **** it. They are lame.
Rabbiroo: Now that is something I can get behind! Yes. Giant Bipedal Rabbits. These are Skirmishers through and through.
Rabbit: It's like this list isn't happy unless it's disappointing me. What the hell would I want a rabbit for when we already have Jackalopes and Rabbiroos?!
Reptile Bird: Polly want a creative idea. Polly want a creative idea.
Saber-tooth Moose-Lion: Okay, heres how this goes. You have the baby, or babies, which don't attack, they just get in the way. The have some ability that makes distracted so you can't use an ability for turn, like they jump on your face and immobilize you with licks or whatever. Anyway, they aren't a threat, but if one of them dies, the adults get more dangerous for the rest of the fight. So the adult is a Brute, obviously.
Scorpion: Why?
Screeching Dodo: These things don't have a face and they make such a loud noise that it can be heard for miles. Artillery. Adorably Artillery.
Serpen: "A serpent-like seahorse." says the Avatar wiki, I was all like... another boring animal. But no no, this is the giant sea-monster from Serpent's Pass. It's a huge Controller, makes waves, eats people. Also, importantly, it's
not a dragon. There are only two dragons in the world of Avatar, and that's an important thing to keep in mind.
Se Tu: Giant, green catfish with human face! GAH! They should come in swarms and they should be Controllers, cause they leap out of the water and taunt people with their horrifying faces!
Scorpion Bee: It's not much cooler than a bee. I don't really think they are worth out time, but I suppose you could make them a Minion Controller Swarm.
Shirshu: What's a Shirshu? If you said a giant-giant anteater that can track someone by scent across a continent and paralyzes it's prey with a giant, lightning fast tongue then you've seen that episode of Avatar, cause no one would guess that by its name. You hear that, you are a cheater. Anyway, mount, elite, Controller, done.
Singing Groundhog: YAY! They sing, they dance, they... don't do anything dangerous. I don't know, they could be a form of really, really wierd Hazordous Terrain.
Skunk Bear: Yay, now our bear encounter has Artillery!
Skunkfish: Why eat a fish when you could eat a fish that smells terrible?
Sooty Copper Fritillary: It's a butterfly. A pretty, pretty butterfly.
Sparrowkeet: Tiny bird. Moving on.
Spider: I don't know, I think it's phonetic Korean or something... I can't even figure out how to pronounce it.
Turkey Duck: The mysterious "duck" returns! This time mixed with some sort of living Key thing... could be cool in a dungeon. "WATCH OUT! THAT'S NOT THE KEY TO THE TREASURE CHEST! IT'S A TURKEY... duck."
Unagi: I like to think that whole "The moon was the first waterbender" thing is a bunch of bunk cause Waterbenders didn't want to admit they learned magic from a giant Eel. That would explain why the Unagi hangs out in the Earth Kingdom, where it gets some respect. Colossal Solo Artillery.
Viper Bat: Okay, this is scary. Silent, flying veneous predators that can see in the dark and hunt in swarms. Awesome. Clearly a Swarmy Lurker.
Wolfbat: This is the description from the Wiki: "Wolfbats are the size of a wolf, and for the most part, resemble the creature, apart from their bat-like wings and face." That's right, fear them. They are the scariest thing on this list. Also: "It is unclear whether the Wolfbat uses sonar to determine the locations of its prey (like a bat), or relies primarily on scent (like a wolf)." Oh GOD THERE IS NO WHERE TO HIDE!
Wood Frog: If you suck on this thing, it cures you of dementia and fever. It has to be frozen though... uggh... I don't know, it was a wierd episode.