Well then, Sinnoh Remakes have been pretty much confirmed. I realize that was already the case with all the Sinnoh pokemon that have been revealed, but then you give us a location in Sinnoh for a card and I won't be surprised if I see them in a Nintendo Direct or something.
Obvious stuff aside, whoa this card is good. I wouldn't actually put this in my current Solgross Deck, because I want my energies in the discard pile, but this is getting 2 cards in your hand for something like discarding them for a free Ultra Ball or maybe Plummeria, or better yet if you went for it, the new Magnezone that's coming out (the following idea seems redundant but you could run Starmie to get back 2 more energies and charge up DM Necrozma every turn if you're not ability locked). It's just more cards in your hand for certain stuff, and it reminds me a lot of Power Tree, a stadium card that existed more than a decade ago that I have fond memories of.
Good stuff! Would play in any metal deck but things involving Metagross.