Baku-Gear Card
From The Bakugan Wiki
Baku-Gear Cards are a card type that is introduced in Bakugan: Armored Alliance, coinciding with the introduction of Baku-Gear. How they play is currently unknown. They feature a gray border around the edge of the card, instead of the previously used Faction-colored borders. They appear to provide additional Damage, B-Power, and/or effects.