The update enforced the official Video Game Championships (VGC) 2018 rule set, automatically restricting banned Mega Stones (e.g., Kangaskhanite, Gengarite) and Z-Crystals in ranked battles. It did not, however, add new Pokémon forms or moves.
The update fixed a bug where rental Pokémon in the Battle Agency (a Festival Plaza facility) would retain illegal movesets or abilities from previous players’ save data. This stabilized online co-op battles. pokemon ultra moon update 1.2
Version 1.2 silently patched a GTS text-injection vulnerability that allowed malicious users to crash others’ games by sending custom nickname strings. This was a critical security fix. The update enforced the official Video Game Championships
Unlike modern Nintendo Switch titles that receive extensive downloadable content (DLC), main-series Pokémon games on the 3DS relied on free patches to correct critical errors and adjust online features. Pokémon Ultra Moon and its counterpart Ultra Sun reached Version 1.2 on April 4, 2018. This update came five months after the game’s release and preceded the Pokémon Sword and Shield announcement. This stabilized online co-op battles
[Generated for analytical purposes] Date: April 14, 2026
The most notorious exploit resolved in 1.2 was the “Poke Pelago egg duplication glitch.” Previously, players could manipulate the Isle Avue hot spring to clone Pokémon eggs, allowing unlimited legendary or shiny Pokémon. The patch permanently corrected the memory handling error, making duplication impossible.