Justice Alloy

The Justice Alloy is the top half of a blue and silver. It is found on the last sublevel (7) of the Snagret Hole, where it is held by a ferocious Pileated Snagret. Once this treasure is retrieved, he unlocks the Metal Suit Z, a member of the Exploration Kit. Although the Metal Suit Z returns in Pikmin 3, it is only an addon to the suit, and this treasure does not exist per se. This piece of treasure is relatively similar in appearance to Forged Courage. Like some other treasures, if the player defeats the Pileated Snagret, but does not have enough Pikmin to carry the Justice Alloy, which requires the strength of 20 Pikmin, it will change weight to match the player's army.

Trivia

 * The Justice Alloy's icon in Pikmin 2's Nintendo GameCube and New Play Control! versions could possibly be an earlier version of the treasure one with a visor instead of yellow eyes, differently shaped and colored horns, a lack of the yellow protrusions from its arms, a lack of a cap bill, an overall shorter cap, and a less boxy body.
 * This treasure seems to have a similar appearance to some of the mechs in the  series.
 * It also has a resemblance to the main mechs from the  series. Its name, and that of the Metal Suit Z, may be a reference to the material that is used to construct these robots, Super-Alloy Z.