Prototype Detector

The Prototype Detector is a treasure in Pikmin 2 that is actually a toy called a "Love Tester", produced by Nintendo in the early 1970s. It is found on the 5th sublevel of the Hole of Beasts where it is held by this cave's boss, the Empress Bulblax. When this treasure is recovered, the will Treasure Gauge will be unlocked. It is the 186th treasure on the List of Pikmin 2 treasures.

Captain Olimar's Journal
"Today we searched a subterranean lair swarming with carnivorous bugs. The name Hole of Beasts immediately came to mind. The convenient contraption I found there has become an invaluable treasure-seeking tool. When it approaches a piece of treasure, the gadget beeps and the needle moves to the right. When all of the treasure in an area has been collected, the device powers down. When we left Hocotate, I thought we'd never be able to pay off the company's debt. But thanks to this gadget, I'm feeling optimistic about the outcome of this daring mission."

Sales Pitch
"Is this a miracle gadget born of universal desire, or a machine manufactured by the master of Dimension X? Whatever it is, it reacts to treasure!"

When found
"How bizzare. This device is emitting black light. It must have been ingested by that creature."

"What an absolutely repulsive life-form. Our return to Hocotate cannot come soon enough."

When collected
"This contraption seems to react when it approached treasure. I will connect it to my radar."

"Processing...complete. The Treasure Gauge is now fully operational!"

"It will appear on your monitor. The needle will move right as you approach treasure."

Trivia

 * When all treasures have been collected your Pikmin will hum the Pikmin 2 theme.