Each Chocobo bundle comes with two distinct bonus cards in Chocobo track foil treatment. There is a total of 20 different bonus cards available that vary in value, and each one has the same odds of showing up in the Chocobo bundle.

To be specific, not all of these cards with the Chocobo Track Foil Treatment feature chocobos, if that's your motivation.

Rule of thumb: If you're buying MTG packs, bundles, etc with the goal of getting a specific treatment of a specific card art, you are 100% of the time better off buying the card off of a player market specifically rather than chasing it via RNG.

There is no exception to this and has never been an exception to this.