It doesn't untap during its controller's untap step for as long as this creature remains tapped
There are two items (I am not counting the Fossils as, though they do have their own abilities, they are just the awkward things you evolve prehistoric Pokemon from), one which could be useful, one which is just annoying: Energy Sticker allows you to attach a basic energy from your discard pile on coin flip
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Give each monster slot on your opponents field a number
It also doesn't benefit your opponent if they're not on an Electric or Dragon-type deck
Most notably this is Tinker and Oath of Druids but it also applies to Natural Order, Birthing Pod and to a degree things like Aetherworks Marvel and Shelldock Isle