How to obtain a masterball in sapphire?

EASY!!!! TEAM AQUA HIDEOUT but wait save that masterball a pokeball can catch the kroygore wateva and groudon let me tell you what uyou should save a master ball for ok rayquaza is located in sky pillar for him you use a ultra ball latais make sure you have a wobbufet with a light mirror when latais attcks you after his attack you use a ultra ball make shure you by tons of ultra and timer and poke and hyper but wait....... latais is the most diffcult pokemmon in the game it took me 6hours and 90mintues so acttuly 7hours and 50mintus and yes i was counting and dont get to excited anddd waitttt im not done!!!!!!!! once latais appears in the wild ur not gonna catch him the first time but make shure you save and stuff before you even throw a ball at it ;] hope i heled and good luck