From what I know the main issue is actually from apples side rather than from PRO itself because of apples limiting rules for third-party applications.
Are you able to login to the forum with that username and password?
Did you possibly use any special characters on your password? If yes make sure to reset it to a password which only contains normal letters and numbers and try to login again.
https://pokemonrevolution.net/forgot-password
It is coded as you can check here: https://pokemonrevolution.net/forum/topic/28126-list-of-broken-moves-abilities-in-pro/
What made you think it is not coded though?
IV locked rerolls are only rewarded from special occasions like from quests during seasonal events, PvP Ladder Tournament, PvP Summer Tournament and other special mini-events.