The Harmony Ball

A conceptual Pokéball dreamt up by Maizie Gantetsu while working for Silph Co.
In theory, a Harmony Ball may be able to undo the damage caused to a Pokémon by a Simulated Battle Ball however the raw materials needed to craft one are rare and exceptionally difficult to procure. Maizie’s last hope relies on a group of adventurers retrieving a shining, Chromatic Green Apricorn, an extremely rare mutation of the standard Apricorn.

Concept art found on Maizie Gantetsu’s desk