I may think Arceus has a chance to beat them all, since he has recover and st00f and other ossim moves.

Arceus sure is God but he just won't be able to defeat all of the legendary at once.Remember Dialga and Palkia can use Heal Block which will prevents Arceus from healing.
Although the fight will be interesting to watch.

Arceus sure is God but he just won't be able to defeat all of the legendary at once.Remember Dialga and Palkia can use Heal Block which will prevents Arceus from healing.
Although the fight will be interesting to watch.

Arceus created Palkia and Dialga on a whim. She is nearly omnipotent. She could easily wipe them and any other Great One from existance, thus winning the fight.

Now, if she decided to fight on a fair plane it would probably be much more difficult, but I believe she still has a chance. You saw what she did to Palkia and Dialga in the last movie. They barely stood a chance, and most of their attacks did almost nothing considering that she was able to use the plates to absorb attacks.

WELL. It depends what plate it's holding. But even then, out of all the legendaries they will have at least ONE powerful move for each type. Arceus is no match for them all.

In the 12th Film, it missed 5 Plates
Now what if Arceus had all Plates? yup, the Legendaries are dead.
(SHAYMIN NOOOOO *Eats before Arceus kills it*)

Arceus is not a she.It's genderless.

Arceus would win if it has to fight with only one legendary at a time.But if it fights all the legendaries at once,Arceus will be a dead toast.