In the Pokemon world tournament in order to get to the champions tourney you must beat all the leaders tournaments (unova, kanto, johto, sinnoh, hoenn.) and THEN you must beat the world leaders tournament 10 times in which after that you will be able to battle the champions (iris will not be in any tournament) also you have asked a question already answered: http://pokemondb.net/pokebase/101396/how-do-you-unlock-champions-tournament-at-the-pwt
