Pikachu Gx is just weak. Very few decks will struggle to hit 160 every turn. Agility is annoying but we have better agility options than a 160 hp GX. Will exists but using your supporter for turn is really bad considering you are only stalling 1 turn with 20 damage. E power won't help 20 damage. Volt tackle is a brilliant way to damage your own 160 hp gx. 150 damge is a 2 shot. Maybe E powers will help. The Gx attack is just more low damage stall. Best lightning GX attack. Cough Cough, Tag bolt, Cough, Cough, Full Voltage, Cough, Cough Whatever ChuChu's GX attack is called.