Umm, your not "allowed" to fly there, because latias will fly away. Mainly, what im doing is checking where it is.. then if its not close to me, fly again to move its spot. then check again to see if its close, and if its not, fly somewhere else again etc.
Ok thanks for your help! I see what you mean, each time you use fly, it detects it, so you use fly to move it closer to your location! I'll try that someday, thanks again!