After catching or defeating the Ledgendary Birds Articuno Zapdos and Moltres, Pro. Oak will also release the Legendary Dogs Entei Suicune and Raikou so then that capture them or defeat then return to Oak for more stuff.
You can't
No.
follow them and then capture them
I don't think you can refight any legendary Pokemon except the wandering dogs.
# Articuno # Zapdos # Moltres # Mewtwo # and one of three legendary dogs (depending on your starter Pokemon)
They are not found in the wild in Pokemon Platinum.
you dont
no
no.
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By the way, they are the legendary cats, not dogs. The Pokemon Company revealed that Raikou is a tiger, Entei is a lion, and Suicune is a cheetah.
suicune, entei, raikou, 3 legendary dogs. then the birds, ho oh, lugia