Mech

Mech suits are bulky suits of armor worn by Federation Marines in Metroid Prime: Federation Force. They can be customized before each mission in the Team Toolkit with Support, Offense or Assist items, making each soldier into a "healer, warrior or wizard" similar to classes in an RPG title. The Mech suits are similar to Samus Aran's Power Suit, possessing only 100 units of energy. When at critical health, their Heads-Up Display will flash red and the suits will smoke and catch fire. Shooting a Repair Capsule at the Mech will heal it, and if the Mech is down they can be revived. The suits have Missile icons on them, which may represent the equipment that soldier is carrying, and color-coded visors.

The Mech suits resemble the armor worn by Marines in Metroid Prime 2: Echoes and Metroid Prime 3: Corruption, although in a chibi-style.