For the current release of PokemonMD: Disciples of Corruption, this is probably the most advanced idle animated mob. It is really just coded with tail animation coding like see here with Zombie Umbreon:
http://www.furaffinity.net/full/12960094/

The difference is that the "tail" has all these little parts attached to it. And they animate smoothly. That is kinda why the code looks a little bloated for all my tail animations rather than using a nice for() loop. It is easier to attach all the parts to the "tail." This is definitely a mob to check out in my modification in creative mode.

This is also my first successful attempt at creating partial textures as see on the front "fangs." For such a simple task, it took me a long time to figure out.

And now I shall be off to work on Doomstone Glaceon with it's hopefully semi-transparent ice block it is stuck in.

You can find the journal link here: http://www.furaffinity.net/journal/5448842/

And again, the usual info for FA's asshole admins:
Eelektrik is copyright Game Freak/Pokemon Company
PkmnMD: Disciples of Corruption is a modification to the game, Minecraft by Mojang, and at this time is modded solely by me.

This mob was made with:
~Eclipse Juno (Java coding)
~Techne for the modeling
~Adobe Photoshop CS5 for the texture
~Audacity for mixing its cries from Pokemon X/Y's Amie of Eelektrik, Luxio, and Tynamo cries
~Fraps for taking video footage of the mod in action
~Adobe Premiere Elements X for dissecting the Fraps footage to bring you this screenshot collection

And if the asshole admins don't find this convincing that this is MY work, check the copywrite on the mod's post in the Minecraft forums. You'll find "Eclipsis" in the fine print after my DA aliases.