Accelgor's role in the games is often that of a supportive Pokmon due to its ability to outspeed most opponents and disrupt strategies with moves such as Encore and Spikes
Its more than just a collectors piece too, its a powerful piece of equipment in its own right
When a Pokemon in TCG Pocket is inflicted with the Sleep status, that Pokemon is unable to perform any attacks, or abilities, or retreat back to the bench
Your opponents will have fewer cards to play and more mana to spend
Her first ability, Unquestionable Wisdom , is a great tool for token decks that want to swing out with everything and still have blockers open, while Hunt for Heresy's role is to get those death triggers many other cards in the deck need to function
In-demand singles are being acquired by the bucket-load, sent off to grading companies (such as PSA or BGS) to be re-sold at steeply higher prices