Ingsphere Caches are use by the Ing to store items in a dimensional pocket. They are found only in Dark Torvus Bog. They usually only release their held items to the Ing, but they can be destroyed to access the stored objects - occasionally destroying the item in the process.
- "The Ingsphere keeps useful items in a dimensional pocket. Normally, the Ingsphere will only release the item to its Ing master. The pocket can be breached by destroying the Ingsphere, however. This sometimes destroys the item, but can be worth the risk." — Logbook "Ingsphere Cache" (Metroid Prime 2: Echoes)