TO GET VOICE IN THE OFFICIAL LADDER TOUR CHAT ROOM ON POKEMON SHOWDOWN:
Step 1: Register in this thread according to the rules laid out in QuiteQuiet's OP
Step 2: Go into the Official Ladder Tour room on pokemonshowdown.com while logged into one of the alts you registered in this thread
Step 3: PM any of the online room auth (you can check who these are by typing /roomauth) and link them your signup post. They may be AFK or busy, so don't freak out if you don't get an answer right away
Step 4: Don't be an awful presence, anyone entrusted with moderation powers in the room has the full faith of the TD team to devoice anyone acting out of bounds