about arceus having a thousand arms if you play the game and research enough it says that after "the one" (arceus) created dialga/palkia and so on it went into a deep sleep.
And in that sleep or while creating dialga/palkia and so on it could have lost alot of its power turning it into a normal pokemon explaning why it can be caught but it dosent mean it lost all of its power.For example look at its base stats. that could explain a lot of myths and legends about its "arms" and being able to be caught after all a pokemon is a pokemon. If i am wrong disreguard this post.
And in that sleep or while creating dialga/palkia and so on it could have lost alot of its power turning it into a normal pokemon explaning why it can be caught but it dosent mean it lost all of its power.For example look at its base stats. that could explain a lot of myths and legends about its "arms" and being able to be caught after all a pokemon is a pokemon. If i am wrong disreguard this post.