Pokemon TCG Pocket has plenty of Grass-type Pokemon, from fast-hitting insects to titans that will continuously heal themselves
Since there were so many other Dark-type Mega Pokemon to choose from at the time, it was likely easier to just leave Sableye to its treasures
If giving a character Ward is what you are after, this location is essentially a cheaper and more resilient 003-101
The rest ramp, card advantage, and the colorless staples every EDH deck wants
Simian Spirit Guide for example, enabled many degenerate combos to achieve their goals a turn faster and allowed players to cast a turn two Blood Moon or a turn one Chalice of the Void before being banned from Modern
Casting non-creature spells with a cost of three or more while Yshtola is in play causes each of your opponents to lose two life while you gain two in return