The Mysterious Remains is a treasure in the US and European versions of Pikmin 2. It is a crab claw. In the US version, it is found on sublevel 4 of the Cavern of Chaos, and in the European version, it is found on sublevel 6 of the Snagret Hole.
This treasure is found inside an Emperor Bulblax on the fourth sublevel of the Cavern of Chaos. There are 2 of this boss on the floor, so find which one has the treasure with the Treasure Gauge and carefully defeat it to reveal the treasure. There is lots of water in the sublevel, so Blue Pikmin may be required.
This treasure is found on the Snagret Hole's sixth sublevel, inside a Dwarf Orange Bulborb that falls from the sky. This enemy can fall anywhere, so look carefully and be cautious around the other enemies in the sublevel. To find its location, first defeat the Antenna Beetle so the Treasure Gauge works properly, and then follow the sound of the Treasure Gague. Be prepared to deal with water hazards and use Blue Pikmin when necessary.
“This looks like some part of a crustacean. Its shape vaguely resembles a pair of scissors, but I've never seen anything quite like it. It's fair to assume this creature has already perished. But I don't understand why it hasn't already begun to fossilize. Perhaps it was eaten by another creature, and it spit out these unwanted parts? Whoa there. That's crazy talk...”
Sales pitch
“Snickety-snackety-snip!
Think of the colossal creature that had pincers like this! These are the only remains, so your imagination can run wild. Imagination knows no boundaries!”