Added in v0.13.0, The Amulet of Many Minions adds combat AI for every vanilla Pet, excluding Light Pets. To minimize the risk of cross-mod compatibility issues, these AI updates do not affect vanilla pets by default. To enable combat AI on a Vanilla pet, an AoMM Version of its pet item must be crafted from the vanilla pet item at a Demon Altar. In addition, "Replica" versions of the Master Mode boss pets are sold by the Travelling Merchant outside of master mode so that these pets' combat AI can be used by any player.
Combat Pet Levels
Combat Pets are mechanically distinct from the regular minions added by The Amulet of Many Minions in several ways. The first and most significant is that, rather than having a fixed set of stats, Combat Pets' AI scales with the player throughout the game. By having a special class of item called the Combat Pet Emblem in their inventory, created from common Crafting materials at most tiers throughout the game, the player's combat pets' damage, movement speed, and search range will increase to match that of a typical minion available at the same progression tier. This allows a player to use their favorite combat pet throughout the game. In addition, while higher tier combat pet emblems allow the player to summon multiple combat pets at once, only one of each pet may be summoned at a time. The Combat Pet Emblems, and their effects on minion stats, are shown below: