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.
Thank you, Yusuke! I appreciate what you did. I've been wanting to re-live my days of playing Ruby (I lost my copy, when I moved to the city I currently live in), so this is the best option, until Game Freak/Nintendo decide to remake Gen. 3 (I refuse to pay the ludicrous prices for the Gen. 3 games).