Chesnaught, Delphox, and Greninja first appeared in the Pokémon X and Pokémon Y games, which released in 2013. New Mega Evolutions—evolved forms that transcend standard Evolution—of these three Pokémon have now been discovered.
Obtain Mega Stones in the Z-A Battle Club’s Ranked Battles
The Mega Stones required to Mega Evolve Chesnaught, Delphox, and Greninja can be obtained from the the Z-A Battle Club as rewards for battling other Trainers in online Ranked Battles.
Ranked Battles offer three types of rewards: battle rewards obtainable after each battle, promotion rewards obtainable upon rising in rank, and season rewards—which vary by rank—obtainable at the end of each season. Keep battling and refining your skills to try to get a variety of rewards. Mega Stones for Mega Chesnaught, Mega Delphox, and Mega Greninja can only be obtained as rewards for being promoted up the ranks.
Mega Stones Obtainable as Promotion Rewards
Ranked Battles Season 1
Schedule: Starting October 16
Reward: Greninjite
Ranked Battles Season 2
Schedule: Following Season 1
Reward: Delphoxite
Ranked Battles Season 3
Schedule: Following Season 2
Reward: Chesnaughtite
Details about Ranked Battles Season 4 and other future seasons will be announced at a later date.
• Any Nintendo Switch Online membership (sold separately) and Nintendo Account required for online features. Membership auto-renews after initial term at the then-current price unless canceled. Not available in all countries. Internet access required for online features. Terms apply. nintendo.com/switch-online
• Greninjite, Delphoxite, and Chesnaughtite stones cannot normally be obtained during regular gameplay.
• Mega Stones obtainable as promotion rewards are planned to be redistributed in future seasons.
• It is possible to have no more than one of each kind of Mega Stone. If you already have one of these Mega Stones, you will be unable to receive another as a Ranked Battles reward.
• For more information, please check the in-game news.