Waku Waku Mimi Nyami Tankentai (わくわくミミニャミ探検隊 Exciting Mimi and Nyami Expedition?) was a main event, taking place from 7/4/07 to 9/26/07. The event was unavailable without an e-AMUSEMENT pass, however. Players could choose Mimi or Nyami as their player character, and traverse a board game-styled map, spanning four worlds and four routes. Each world/route had a specific set of songs that needed to be cleared to progress, and clearing these songs allowed for them to be played during normal play.

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