1. The length honestly wasn't planned. I actually was afraid it would be too short, until I stopped recording and actually got a look at the length. I didn't realize it was 30mins long when I was recording it
2. By copying their commentating styles you mean talking about shit completely unrelated to the game or pokemon? Ya, I really hate that. My style of commentating is just what I do in my head when I am playing, but I am vocalizing it.
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Sure, he released Goodra, but in his battles, Ash is really showing great strategy and battle prowess. Much more so than BW where he once brought only 1 pokemon to a gym battle because he thought it was all he would need.