Pokemon Black 2 Cheats[ NDS ]
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Secret - The 3 Musketeers
The first member of the 3 Musketeers, Cobalion, will appear before you and right upon your arrival to Chargestone Cave. After that brief scene with Cobalion it runs off somewhere. Cobalion will appear in Route 13, Virizion appears in Route 9, and Terrakion appears in Route 22. They will all stand in the middle of the road awaiting for your capture.
Upon approaching Terrakion, Professor Achroma appears and gives you the Achroma Machine. It is used to control Pokemon, mainly the Crustle that blocks your path in order to continue the story. You can catch it or defeat it to get through, but it can be used once.