Legendary Pokémon all used to have 3 major things in common with them. 1. they were the one and only member of its species 2. they seemed to have been there since the beginning of time (or for a whole long time) and 3. They NEVER evolved. Over the years though these rules seem to have been broken. The first rule is broken by Lugia who had an offspring in the anime. The second rule was broken by Manaphy, who in the anime hatched from an egg thus being level 1, and Cosmog who in the game is in it's first evolution state which brings us to rule #3 which was broken by Cosmog by being able to evolve not once but twice! Now with all 3 rules being broken how do we determine which pokemon should be a legendary and which shouldn't? I have over the years stated that Arcanine THE LEGENDARY POKEMON is not a legendary due to it's evolution and there being mutiples, same as Lucario & Zorua. Absol because there were more than just one as well as the Unown. What rules now state that these rare and powerful Pokémon shouldn't be legendaries even though they have deep links with them? I used to think legendaries where the guardians of the pokemon universe bringing balance to nature yet how can you do that if you're in your weakest form? What Makes a Pokémon a Legendary?