tm= tournament mode.caps your poke over level 50 to level 50,enforces clauses i.e species clause and Op items and can enforce tiers aswell..right click on a player,battle,and under mode change normal to tournament mode..prince ninjad me but forgot the parts after the level cap so ima still post this..as for tiering follow princes link,or like he said open your dex and tier options are in the top right corner.