I recently decided to make use of the minion zoo, and upon going there, I've noticed that a good portion of the minions I deposited there have stats and levels, although most of them don't. I'm confused. I DO seem to recall minions helping in battle at one time a long time ago...or maybe that was the other pet site. Is this a retired feature, or do only some minions provide stats?

Minions do not help in battle, their stats are their own and are used solely for the Minion Zoo.

Which is...a bit of an abandoned feature

thats for minion battling, click on the minion image of a minion with stats to start one

Ah, all right. That makes sense. Thanks for the replies everyone.