Which Kirby game first introduced multiplayer helper mode?

The Kirby game that first introduced multiplayer Helper mode was Kirby Super Star. Its Helper system lets Kirby turn many copy-ability enemies into allies, with a second player able to control the resulting character.

Helpers are created when Kirby sacrifices or transforms a copy ability into an ally. A Burning enemy becomes Burning Leo, a Sword enemy becomes Blade Knight, and other abilities produce their own specialized partners. Each Helper uses the ability it represents, so the mode changes both combat and cooperation rather than simply adding a second identical Kirby.

The feature grew from a deliberate focus on cooperative play. Director Masahiro Sakurai designed Kirby Super Star around two-player teamwork, with the Helper supporting Kirby while also making the game more approachable for less experienced players. The computer can control the Helper when no second player is available.

This is different from later games such as Kirby Star Allies, where multiple characters can join Kirby more directly. Kirby Super Star established the core idea: one player is Kirby, while another can assist through an ability-based partner.