Ho-Oh

Arceus

Ho-Oh Arceus Lugia

I think omastar is the strongest

It's surely Arceus

Arceus cause he created all other strong Pokemon.

I think any legendary pokemon

For me, the strongest Pokémon is Sawk. Stephan's Sawk is really strong and he is incredible. An example of his strength are in "The Club Battle Hearts of Fury: Emolga Versus Sawk" when he was able to destroy Emolga's Attract using Close Combat, and then later on during the battle when he was still able to attack Emolga even though he was paralyzed. Another example of his strength was in "Searching for the Clubultimate" when he was able to rip open a punching bag with just one punch.