If you are finding yourself unable to log in, you should be able to fix the issue by following the following process.
1. Close all browser tabs with any part of Bulbagarden open.
2. Delete all Bulbagarden.net cookies (and if possible, any cached site data for Bulbagarden) from your browser.
3. Close and reopen your browser, open a new tab, and log into the forums on the new tab.
If you've followed this process and are still having issues, please contact us via the "Contact us" link at the bottom of the forum.
I don't think they'd spoil the winner just like that, a couple of days before the episode. As far as I remember no one knew who'd win the Kalos League until the episode aired (there was even rumors about Flare-dan interrupting Satoshi and Alan's battle).
In other sagas Satoshi never made it to...
Originally I'd say that Satoshi's chances of winning'd be next to 0%, but since SM broke so many patterns and became almost a whole new show, I guess his chances increased? In real I can see both of them as the champion.
Maybe his victory'll lead to the yet-to-be-revealed new saga and that's...