|Appears in||Pikmin 2|
|Treasure Hoard Number||157 (NTSC)
|Series||Mystical Energy Series|
The Proton AA is a treasure found in Pikmin 2. This treasure is actually just a AA Duracell battery. It is found in the fourth sublevel of the Submerged Castle, near some poison pipes and Bomb Rocks held by Volatile Dweevils and Careening Dirigibugs.
"This object resembles the first treasure I found on this planet, so it holds certain sentimental value to me. However, I've just noticed that the size it slightly different. Sometime, I should take the time to read my previous treasure log book. It's good to reflect on the past sometimes..."
"Some enigmatic energy unknown on Hococtate is trapped inside: who couldn't use more energy?"