What factors do tu think will attribute to who wins this fight?

Well, I personaly think Bayleaf has the higher strenght because of how much Ash mean to her and I know at heart, she won't give up that easy ;D

Sadly for Bayleaf, I think Latias has the biggest endurance because of his independence and yet power he represents with his natural condition! :)

I'm not quite sure about the determination but I believe that Latias may have the greater deal in this case because I think he's más a fan of fights in general, while Bayleaf is a greater fighter for amor meaning Ash! :)

I don't really know about the weather o the pokemon's condition but I diffenently believe that no matter how hurt Bayleaf is, she will keep on fighting till Latias is down to earth! :D

Bayleef has higher determination! Latias met Ash first. Latias has higher strength. But u don't need strength 2 win u need determination, and that is what Bayleef has! I VOTE BAYLEEF!!!

Bayleef is más determined to get Ash, because, well, you've seen the shows! She wouldnt give up!

But I believe that Latias is stronger and has the advantage of being able to fly.

Sorry Bayleef, but Latias has the best chance of winning in my opinion.