1 Get the acro bike, fly to rustboro city , and get like 50-60 timer balls
2 Get wobbafett that knows mirror coat that level 25 -30
3 Go to slateport city and and get about 50 of any repels
4 Go north and have wobbafett first in your team
5 See the patch of tall grass Use a repel, and by pressing and holding down B you will start to hop
6 Hop in the grass for about 20 seconds,and if you dont find it in 20 seconds, go into the cycliing road building
7 Repeat steps 1 though seven until latias or latios is found


Ps you have to have beaten the pokemon league
Please try cheat before rating it

I hope I helped!!!

bew1117