I had one too! I was using the 1E rules that some small percentage of mimics are intelligent and decided this one - Mimi the Mimic - was intelligent enough to make a deal of being fed regularly in return for guarding the treasure within and around it!I had a friendly vegetarian mimic a few weeks ago.
I don't even know what an eladrin is, but evil gnomes? YES!Other than that, do evil gnomes and eladrin count?