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Actual Pokemon speedruns are kind of interesting, but tend to be "Pick starter that can kill shit the fastest, level him to ungodly amounts, spam X items on harder fights to get through them, etc".
The actual battles tend to be a bit boring, but how they formulate the route and who to fight can be entertaining. I remember a HGSS speedrun that used tweaking to get into the Elite Four early without certain badges (Badge check is broken in that game).