and, to answer your question, they were seasonal armatars. there were contests to make a user-made armatar, and everyone could get the one that the winner made. the contest was hosted by (i think) Carlie, (an admin btw,) but she isn't active anymore, so the contests stopped. (i may be wrong about this contest thing, but i'm pretty sure that's how it went)
oh, and, sorry for the double post, but this isn't where this thread belongs. this is AG2, and AG3 is coming soon. this is where people talk about the new features that AG3 should or is gonna have. it's in a beta right now. you can sign up by going here. you'll get an email with your invite code when the next update comes out, which is june 14. you can ask a moderator to move this thread to the support and suggestions section. (the mods are here, just scroll down a bit)
Funny how I made both of those. Either way, a small note on proper OPs: They are supposed to be where the info of the thread is. And also, should not be spam. Thanks.
Either way, as pointed out, those armatars are currently unavailable, and might continue to be that after AGv3.