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Finally.
Doing this was expensive, I bought the 3,000 diamonds, and even with 20 diamonds a day and some extras from Miis or challenges, I only have 135 diamonds left now.
Which sucks because I could use the level 10 special trait tree and level 10 wealthy tree. They cost 400 and 300 diamonds respectively.
Still need to beat the final battle royale though, and still need to get all the Dialga/Unown forms, plus other legendary formes like altered Giratina, Deoxys, Shaymin, Keldeo, Kyurem etc.