At around the same time the Amy 2 packs started appearing in stores, they released Knuckles on a single card. This is perfect for if you missed him in the comic 2-pack, or didn't want to spend 13 getting him. He should remain in stores for as long as 'line 2' is considered to be 'out'. No known improvements for this figure were made or needed. He still comes with the base, hidden behind the label on the front.