Description
Matsubusa, internationally known as Maxie, leads Team Magma, an organization committed to expanding the world's landmass to advance human progress and evolution. He views this mission as essential for humanity's future, believing increased territory provides a grander stage for advancement and benefits land-dwelling Pokémon.

His operations target the ancient Continent Pokémon, Groudon. Across Pokémon Ruby, Omega Ruby, and Emerald, he orchestrates schemes like stealing Devon Goods in Slateport City, taking a meteorite from Professor Cozmo to trigger Mt. Chimney's eruption, and seizing the Blue Orb from Mt. Pyre to control Groudon. In Emerald, he awakens Groudon at Mt. Chimney but loses command, causing widespread chaos. Following repeated defeats, he recognizes his errors, disbands Team Magma, and focuses on mitigating the fallout from Groudon and Kyogre's conflict.

In Pokémon Omega Ruby, Zinnia manipulates Matsubusa, intending Groudon's rampage to provoke Rayquaza into stopping a meteorite. He later appears in Pokémon Ultra Sun and Ultra Moon within Team Rainbow Rocket, a coalition of villains from alternate dimensions. There, he attempts to expand the landmass of another world before defeat returns him to his original universe.

The Pokémon Adventures manga depicts a more antagonistic Matsubusa. Operating without a fixed base, he moves between Hoenn's caves, successfully stealing items like the Scanner from the Abandoned Ship and both the Red and Blue Orbs. After Rayquaza halts the battle between Groudon and Kyogre, Matsubusa descends into madness, attacking allies and foes. His fate diverges; Archie implies he died from the Red Orb's energy consuming his body.

In the main anime series, Matsubusa initially seeks to expand Hoenn's land for peace. He captures Ash's Pikachu to exploit its connection to the Blue Orb for controlling Groudon. Witnessing Groudon's uncontrollable power and ecological impact, he abandons his goals, disbands Team Magma, and accepts Hoenn's land should remain unchanged. His post-disbandment status is retired.

Within Pokémon Masters EX, Matsubusa partners with Groudon. He collaborates with rivals like Archie to address crises involving Legendary Pokémon on Pasio Island, demonstrating pragmatic willingness to set aside ideological conflicts for greater threats. He later participates in a truce between Team Magma and Team Aqua after uncovering external manipulation of their Pokémon.