Even though its tempting to choose a legendary or non starter, i'd have to go with Squirtle.
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Hah, I gave this a heap of thought a few years ago, and my answer will always be the same.
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A growlithe, but that would mean no Close Combat for him since it requires breeding.
Ponyta. A Pokemon friend, fighter, and means of transport.
I was thinking what if the anime did a combo-move of Extremespeed and Close Combat? Lucario and Growlithe could both us it the opponent wouldn't stand a chance!
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Hmm...I could see Arcanine hitting the opponent at blinding speed with its tail probably using some strong bite moves our slamming its paws on its opponent. Or like DBZ all you'll see are blinding moves that send the opponent reeling.
Let's try and keep the discussion on-topic. If you wish do discuss how moves would look like in reality, please create a new thread for that.