From Pikipedia, the Pikmin wiki
The Justice Alloy (正義合金ジャスティスZ?, lit.: "Justice Alloy Justice-Z") is the top half of a blue and silver robot toy. 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.
“I found this metal treasure in the gut of an avian snake. It took real courage to drop into that dark den, but danger's what I do best. In honor of my brave clash with that feathered serpent, I've named that den the Snarget Hole.”
“You cannot see it and you cannot touch it, but it is definitely here and there. What, you ask? Whatever this suit is fortified by , that is what. I cannot believe there is a better material than what I am constructed of...”
“You've done it! That bird-beast will trouble you no more!
Processing... How curious. What's that impressive, mechanized masterpiece?
Brrrzzt! Does not compute! A metal this dense defies the fundamental laws of physics!
And yet...if I use this to rework our president's treasured space suit...
Processing...complete. Fabrication of the Metal Suit Z is now concluded.This suit is extremely durable. Getting gnawed or stepped on will now produce minimal pain.”
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