Xerneas & Yveltal (Japanese: ゼルネアスとイベルタル) is the third The Pokémon Tretta series set, and the eleventh overall. It features 48 Tretta.
Xerneas & Yveltal features the titular two members of the aura trio together as standard Tretta following their individual debuts as Legend-class Tretta in the previous two sets. The Pitch-Black Pokémon Darkrai is included as the Legend-class Tretta in this set, and the Lunar Pokémon Cresselia is included as the Secret Tretta, completing the lunar duo. The set also includes two more Pokémon that can Mega Evolve: Scizor and Lucario.
All standard Tretta in Xerneas & Yveltal are colored blue, breaking the color cycle pattern used over the last two series. Search Mode includes locations from Shiny Village, and for the first time since Search for the Legendary Pokémon!, introduces a new location: Mine. It is also the first set to have six possible locations in Search Mode as opposed to five.
The Fervor mechanic is again expanded slightly in this set. Using Tretta from the latest set may now elevate Pokémon to the "Best Condition" at the start of a round as opposed to just "Good Condition". Pokémon in "Best Condition" are identified with a bright yellow aura, with those in "Good Condition" or "Bad Condition" retaining their red and blue auras, respectively.