After replying to the other thread about Ash's worst league loss, it got me thinking about this topic again. I remember back in Kanto, Orange League and Johto; Ash had Brock, Misty and Tracey on the sidelines right there in the "coach booth" giving him advice during battle.
Don't get me wrong, I think him without the coaches is a good indicator of his skills improving during a particular region showing us what he learned on his own and him using it to defeat other trainers. However, counting on your friends and the power of friendship thing is something this show seems to preach in more ways than one.
Do you think that it would have made a difference in Hoenn, Sinnoh and Unova for Ash to have his friends on the sidelines helping him out during battle?