If the legendaries had a battle royal including poll

[EMDestroys]

I friend asked me a question if every legendary , mythical and ultra beast ( including sword , shield , primal , fusion , dream , shadow , armoured , etc ) who would win but ditto was also included because he can turn into them so I picked Arceus , ditto , guzzlord and giratina so I thought I would ask you guys who you think could win you can pick more than one so tell me : the pokemon , region , game and why and thank you for your answers destroyers

 

[eonia]

asumming that they can use everithing they have at their dispossal ,the obvius anwser would be arceus,not only he has the highest stats,but with the tables, he can change types at will ,so he can always be at advantage
that, unless the others make a alliance to defeat him first