Hi,
Celebi can be obtained on D/P/Pt/HG/SS [The scan in higher resolution show the 5 signs of the pokemon games.
Raikou/Suicune/Entei can be obtained on any of those 5 versions or HG SS exclusive not sure. However, in Japan, you pre-order your ticket and you choose over-the-counter in the Pokemon Center which legendary dog you want to have; it does not depend on the version you have; you can obtain whatever dog on whatever version but only one per ticket.
I'm not sure how will these 3 dogs be distributed in the US.
