Of course not. You'll be able to battle it without it fleeing until you defeat it or capture it.
in southern island there was latias and latios you will meet latias in Pokemon sapphire and latios in Pokemon ruby
go to the egg and latios/latias will come to you
Latias can be found roaming the Hoenn region after the defeat of the Pokemon League. Latias's counterpart Latios can be found on the Southern Island.
From Serebii.net it seems Latias is wild in Hoenn after beating the Elite Four, and Latios can be found on Southern Island
southern island
In Pokemon Sapphire, Latios can be found in Southern Island.
press A on statue of egg
if you go to lilycove you can get a boat to southern island where you can get either latios or latias
Its called southern island i hope it helped.
Latias --> Southern Island (Nintendo Event only) Latios --> Roaming Hoenn
When you defeat the Elite Four go search for it and it will be on your Pokedex. It will tell you where is it. But if you move to that place it will be on a new area. If you want to get Latias then you will have to get a ticket to Southern Island in Wireless Adapter. It will be at lv.40 when you geta Latios and Latias will be at Lv.50 when you catch it at Southern Island.
The gameshark code is:82FBD860AE242721313D2BCE9004E149EA64214226D6E5A6but,in a Nintendo oficial event,you got the eon ticket.This ticket sent you to the Southern Island,and,here is Latias.