These cards have their merits, especially if you prefer a more competitive approach to Commander, but if you find yourself conflicted about including them, its completely justifiable to keep playing what you enjoy instead
I would say there is a great deal of consistency
2005JP Players Club PLAY promos the five Eeveelution cards as membership rewards: Vaporeon 10,000 points, Jolteon 20,000, Flareon 30,000, Espeon 40,000, Umbreon 70,000
The only Yu-Gi-Oh related collection I have are Yu-Gi-Oh rarities (including misprints and OCG), for which some outdated scans can be found here
Rather, they are meant to be played casually with family and friends, and as a way to experience the timeless joy provided by Pokmon TCG (sure beats Monopoly)