Is Red really the strongest 'Dex Holder?

[GameX]

Hi,

There's something I would like to know; is Red really the strongest of all Pokedex Holders? I'm tied between him and Emerald.

    Spoiler:- Emerald Arc:

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At the end of the Arc, there is the tournament between the 10 Pokedex Holders, and apparently, Emerald won it, because he have the last Symbol. I guess he fought against Red in finals. But, is Emerald stronger than Red just because of this? Red could have let Emerald win because he wanted this symbol, that's all! Or maybe Red lost because he wasn't serious, he haven't surpassed his limits and fought for the fate of the Pokemon world, like he did in Yellow, GSC and FRLG; it wasn't a serious case, just to have fun. So I'm not really sure who's the strongest between Red and Emerald...
 

What do you think?

Thanks