Sparkling Crystal and Area Zero Underdepths offer fantastic synergy with Terapagos ex, cutting Energy requirements and increasing Unified Beatdowns damage, while Crispin offers an almost complete Energy set-up in one card
There are a few reasons why, but perhaps the most relevant is that there is a much better version of Pikachu, and you will want that out on the table if you can have it
Both are uncommon for Peasant purposes
A Pokemon booster box can contain as many as 200 cards or even more
One of the strongest is Astral Drift, which works beautifully in blink decks that happen to run landcycling and cycling cards
Instead of working with traditional zombie tropes, most have opted to work with Delinkquent's shell, hoping to mirror his inspirational success