Ancient Secrets Series
From Pikipedia, the Pikmin wiki
The Ancient Secrets Series (古代の神秘シリーズ?, lit.: "Ancient Mystery Series") is the seventh series listed in the Treasure Hoard in Pikmin 2. It consists of six treasures, numbered from 52 to 57 (51 to 56 in the Japanese version). They are artifact-like objects.
“You've collected the Ancient Secrets Series! This old junk will make romantics weep with joy!”
Names in other languages