Vehicles are obviously a pretty good fit for this Commander, and your backup - Pia Nalaar, Chief Mechanic - makes that theme even more explicit
The rest of the cards in the deck provide support in a variety of ways: Potions allow us to restore some Health to Pokmon whose Health is at a critical threshold, Teacher Research and Pok Ball speed up the flow of cards from the deck to the hand, and X Speed allows us to remove a Pokmon at the cost of one less Energy, which helps to maintain the huge advantage we get from Misty.
There are special numbered commemorative cards, called Celebration Boxes, containing with rare cards and classic artwork
The commander cares about proliferating, and thats plenty of proliferate in blue and black
It took me a solid year to get them all
As his "Meklord Emperor Wisel" is the only monster that can attack while face-up, Primo gears the majority of his cards toward allowing it to inflict piercing damage or attack multiple times, making the opponent's defensive manoeuvres useless