The Open Architecture (オープン・アーキテクチャ?, lit.: "Open Architecture") is a treasure in the European and Japanese versions of Pikmin 2; it is actually an open can of salmon. It is found in the Citadel of Spiders, on sublevel 3. Yellow Pikmin are rather useful here, amongst the Anode Beetles and Swooping Snitchbugs. This particular treasure is most often found out in the open in one of the main rooms, easy to locate and collect once the enemies have been dealt with.
“I discovered a metallic container. Unfortunately, it was already empty, so it is going to be tough to sell. Some sales talk will be needed for this. Let's see what the ship says about it.”
“The ultimate in reverse psychology! If it's too open, nobody wants to steal it. Its[sic] a shame though, that the contents are so clearly visible.”
Names in other languages