Like most Pokmon cards, the value of Pikachu depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Arceus)
Equipped creature cant be blocked and has Shroud
Of note is the return of Deep-Cavern Bat over Azure Beastbinder and the choice of Faebloom Trick over Preacher of the Schismsensible adjustments if you expect more mirror matches
Granitic Titan also has cycling as an extra advantage, which has proved to be a really useful ability that has had a ton of support throughout the years
Uniqueness Given that its text is basically just a combination of Tormod, the DesecratorTormod, the Desecrator and SixSix with a few things changed, I can't say that Teval, the Balanced ScaleTeval, the Balanced Scale is particularly unique
Some Supporter cards can counter Asleep