One should begin by defining the popular rarities, including Holo Rare, Ultra Rare, and Secret Rare cards
Wizards of the Coast replaced that guesswork with the official 1-5 brackets, built on criteria a decklist can actually be measured against
While not the most popular shiny due to the very subtle color shift, Pikachu being THE Pokmon mascot will always play a factor in its chase value
This Esper commander is sitting at the cross-section of a lot of different archetypes: lifegain, spellslinging, token-making, +1/+1 counters, and even cats and wizards, if you're eyeballing the creature types
Moreover, like every Pokmon except psychic and normal Pokmon in generation one (due to balancing issues, psychic and normal Pokmon did not really have weaknesses for practical intents and purposes), the three starter Pokmon had strengths and weaknesses
The Gatherer search you can see here has the card info split into two different tabs