Hell Mongrel gets the spot on the list over cards like Terminal Agony and Bone Shards because it does both sides of what the deck wants
The Pressure Cooker deck is designed to keep the playing field clear and finish your opponent off with both creature assaults and direct damage
Granted, its non-tokens only, but at minimum creatures that already enter with counters come in with more, and any deck relying on counters (energy, experience, etc.) gets a steady flow of extra counters simply by playing creatures
Here is a picture I took of a regular and Australian Jungle Pikachu from my collection
The next step: It would be really cool to be able to easily do a booster draft using the generated sets, or to print the cards and going from nothing to a completete physical set
Instead, the initial Genetic Apex set has been referred to as A1 internally