The Legend of Zelda Barcode Battler Cards
The Legend of Zelda Barcode Battler Cards is a set of 30 A Link to the Past themed cards to use with the Barcode Battler II console.
It includes two Link cards, a hero and a wizard, 10 item cards based on objects, moves and power-ups from the game, and 18 enemies from the game.
This is considered a direct crossover because this card set is part of both series, being a set of Barcode Battler cards and a piece of Zelda merchandise. Also, since they can be used in-game, elements from the Zelda series can virtually interact with original Barcode Battler elements.
Barcode Battler's company, Epoch, was licensed by Nintendo to create both a Zelda themed card set and a Mario themed card set (see Barcode Battler X Mario).
It may have been part of the agreement that allowed them to include interface capabilities with the Famicom and Super Famicom in the Barcode Battler II.