I released a small patch to Pokemon Challenger today that fixes the infamous "server lockup" bug that would spring up on servers from time to time.
Even if the bug itself isn't fixed, the servers automatically reboot after some time either way just to be safe, if nobody is playing.
Behind the scenes, the update actually has huge chunks of the game rewritten to handle some of the new things that will be supported by the full release of the game - which is certainly in the works!
If you notice any problems, let me know here or on the official forums:
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