I think it would be fun to add hatchable pets that you could randomly/rarely find as drops from certain mobs. For instance a turtle egg that hatches after playing for a total of 2 hours after finding it. Could be used as an item for entertainment value, maybe low damage, or just to watch him walk across the screen during the fight. Other pets might include, baby dragon, baby falcon/bird, a pet rock that never hatches haha. I just want a turtle...please. :)
have a great day!