Helm of the Host on Skittering Surveyor gets me out of a mana bind quick
The top layer, the disguise for the ditto, is not tournament legal, however the Ditto card itself is, and has a pretty unique ability called Sudden Transformation, which allows this card to use any attack of a basic Pokemon in the Discard pile
Entire decks were built around Capsize, and we're talking limited here
Each Pokemon's personality is perfectly captured, and their relationship dynamics are fleshed out with two simple expressions: one of jubilation for Mew and annoyance for Mewtwo
One interesting thing to note about these trainers Pokemon is that they count as their own distinct Pokemon
While this means that section 713 got folded into section 712 (where double-faced cards live), there is no functional difference to this change other than allowing the aforementioned effects to find them