Version 2.6.3 Release
This version fixes the Pokemon Cries/Battle Music crashes, so they should work now. Furthermore, you can now also turn on/off Pokemon Cries during a battle and some server side bugs were fixed as well.
The Damage Calculator got a few optimizations, so it now calculates the BP for moves with varying power (like Gyro Ball, etc.) automatically and other minor changes.
The "Send"-button in the channel window got replaced by an "Open Teambuilder"-button (and switched position with the "Exit"-button) and an option to disable the announcement banner has been added as well.
Some Pokemon also got some new moves from events.
UPDATE (27.03.2016): I've updated the release again, because some people had problems with the old client. Flashes aren't working anymore (sorry for this), but the crashes are all fixed for now.