You're funny. It's 100 Leader Medals for the non-discounted tickets and you can buy 20 medals per month for 15k bond crystals.
They're also unrelated to aqua shadows. The medal exchange should have contained the tickets since it was introduced.
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considering the tickets aren't there, then that proves nutaku is even further behind than they should be... at least i called the bond crystal thing more or less (15k a month won't be too bad to do given you can grind a lot of stuff from the concept missions, bond crystals included)
as for the aqua shadows, i still don't get why they also put those there (along with the evolve option), but no access to those aqua shadows.... it's kinda pointless looking at it like that
I don't even get the 10k ones. I honestly should but I am cheap.
Especially considering my bond crystal count....