What is the best way to catch a Latias/Latios?
If you have found this Pokemon before check your pokeDex and look for its area. When you want to catch it, put a high lvl wobbuffet first on your team. When Latios/Latias appears, it won’t be able to flee because of wobbuffet’s shadow tag. Just wait until it struggles then inflict hits on it. When it has low hp, catch it.