Goblins, humans, and warriors look doable, and you could probably cross creature types (e.g goblin rabblemaster)
Use color coding: Assign a different color to each category of Pokemon cards to make it easier to identify them at a glance
Parallel Rare On a Parallel Rare , the entire card surface is holographic
Going crazy with charge counters is a unique way to go about winning in Commander, and this deck can definitely do it
When searching eBay for error cards, use specific search terms like "pokemon error card," "pokemon misprint," "no symbol jungle holo," or "square cut pokemon" to find relevant listings
First of all, what makes a "good" Commander card is always in the eye of the beholder - or rather, in the hands of the player