Ultra Moon Update 1.2 Patched | Pokemon

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.

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. pokemon ultra moon update 1.2

Post-Launch Iteration in Pokémon Ultra Moon: A Case Study of Update 1.2 The update fixed a bug where rental Pokémon

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. It did not, however, add new Pokémon forms or moves

[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.