This is the demo version (or 体験版) of ポケモン 不思議のダンジョン 空の探検隊 (Pokémon Fushigi no Dungeon Sora no Tankentai) which is available on the Japanese Wii Nintendo Channel for download.
You can play just this one dungeon and the demo ends after it.
http://www.pokemon.co.jp/special/dungeon_sora/news/06.html
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