During this event, players could earn vouchers from battles against Trevor that could be redeemed in the shop for rewards, including Legendary Spirits that could be used to raise Professor Sycamore and Xerneas to 6★ EX. Obtaining 2,000 vouchers would reward players with a medal. All battles could be challenged an unlimited number of times except Daily Extreme Battle 1, which could only be challenged once per day.
This event featured the Battle Challenge, where players were challenged to defeat a team of strong opponents. Players could complete event missions by clearing these areas using various theme skills, earning medals and other rewards.
All sync pairs with the Kalos theme skill received a bonus to their Attack, Defense, Sp. Atk and Sp. Def stats when used for this event, with the amount of the bonus varying between areas.
The event first ran from January 12 to March 6, 2023. The "Sygna Suit Diantha Poké Fair Scout" gave players an increased chance of recruiting Sygna Suit Diantha & Diancie for the duration of the event. In addition, Professor Sycamore & Xerneas received their EX style in conjunction with this event.
In this run, players could earn Event Vouchers S from battles. Event missions rewarded players with Gems and Battle Points for completing any of these battles a certain number of times, and the Battle Challenge mission rewards included a Tech and a Support Move Candy Coin.
Additionally, the music and artwork on the title screen were different than usual. From January 12 to February 13, 2023, the title screen artwork depicted Sygna Suit Diantha & Mega Diancie, Shauna & Chesnaught, and Lysandre, and the background music wasDecisive Battle! (Diantha) (Pokémon Masters EX Version). In addition, a special voice-over line of Diantha saying "Pokémon Masters EX" would play as soon as the game's logo appeared on the title screen. From February 13 to March 6, 2023, Lysandre was changed to be wearing his sygna suit, Volcanion was added, and Shauna & Chesnaught were replaced with Anabel and Emma. The background music was changed toDecisive Battle! (Lysandre) (Pokémon Masters EX Version). In addition, Diantha's voice-over line was replaced with a special voice-over line of Lysandre saying "Pokémon Masters EX".
The event reran from November 24 to December 6, 2023. The "Double Feature Poké Fair Scout" gave players an increased chance of recruiting Sygna Suit Diantha and Diancie and Anabel & Snorlax for the duration of the event.
In this run, players could earn Event Vouchers V from battles, and the amount of vouchers received as completion rewards was increased drastically. In addition, the mission rewards were changed to only award Gems and medals.
If the player had already raised Professor Sycamore and Xerneas to 6★ EX, they could not do anything with his custom Legendary Spirits; so, an exchange was included in the shop to revert the Legendary Spirits back into Event Vouchers V. Performing this exchange counted as obtaining more Event Vouchers V for the purposes of Mission 7.
Title screen artwork (January 12 to February 13, 2023)
Title screen artwork (February 13 to March 6, 2023)
Battle! Friends from Kalos was the only villain event that did not feature any opponents who are affiliated with a villainous team.
Mission 12's objective requiring players to complete the second-round Battle Challenge with a Grass-type sync pair on their team may be a nod to Shauna, whose debut scout began four days after the initial run of this event.