Hey! This item found its way into my inventory. I'm thinking it can't be too rare, but I can't find one for sale. Any ideas?

It's not tradable. It's part of the set of eggs you get from defeating easy and medium challenger five times in the Battle Coliseum.

You can use it as a stat booster from pets up to Tier 3. See the stat booster list on what they do HERE This one raises defense by 1-3.

If you simply wish to get rid of it, you can feed or delete it.

Ah, thanks. I just got into battling if you can't tell. Still learning the ropes!