Max-Flutterby is a Bug-type Max Move introduced in Pokémon Sword and Shield. It does not have a fixed power or accuracy because its power depends on the base move it replaces when a Pokémon Dynamaxes, typically ranging from 100 to 130. Max-Flutterby's primary effect is to lower the Special Attack stat of the target by one stage, which can be strategically advantageous in battles. While it doesn't have additional effects such as causing status conditions, its ability to debuff opponents makes it useful in both offensive and defensive plays. This move can only be used when a Pokémon is in its Dynamax form, adding another layer of strategy to Dynamax battles in competitive play.