From Pikipedia, the Pikmin wiki
The Stupendous Lens is a pocket magnifying glass and a treasure in Pikmin 2. It is found on sublevel 6 of the Snagret Hole and is held by a Dwarf Orange Bulborb that falls from the sky. This item can fall anywhere, so look carefully and be cautious. Take out the Antenna Beetle so the Treasure Gauge starts working correctly and then explore the level. Be prepared for water hazards and use Blue Pikmin when necessary. Other enemies like the Burrowing Snagret(s) may also pose a threat.
It is only found in the US version of the game, with the Japanese version having an exclusive beigoma toy treasure, and the European version relocating the Mysterious Remains to this location. The glass on this treasure actually reflects the world around it; this is especially noticeable on the Hocotate ship analysis cutscene.
The text on this treasure reads:
“I've never seen such a huge lens. It must have been designed as a nano-grade magnifier by a hyper-advanced society of alien mega-brains! Gah!! This object is far too complex for even my superior scientific intellect to comprehend.”
“Peek into this item with a sense of wonder and glimpse a frighteninly gigantic world. This lens is a window into the thrilling world of tiny creatures everywhere!”
Names in other languages