[quote name='opportunity777']I think that's not a good comparison, unless, the install base for the GCN at the time was as high as the Wii is now (or very close to each other). I'm too lazy to look it up, but I don't think so.
The Wii is doing so well, it should be no surprise if games sell better. There are more people to buy them.
What we really need is a % of how many GCN owners bought Melee, and the % of how many Wii owners bought Brawl in Japan. That would be more statistically relevant.
Also, the '4ish days' needs to be extrapolated to one week. Is the 820,000 in an actual week?
Sorry if I seem over-the-top, but it's bad finance habits

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Sorry, guess I should have specified better. Brawl's data is Jan. 31 - Feb. 3. Melee's data is Nov. 21, 2001 - Nov. 25, 2001. Both numbers were released mid week, so the "first week" for both is really only 4 days of data.
If we take the most recent number of console owners in Japan ([url="http://wii.ign.com/articles/846/846720p1.html]5 million[/url]), that still means that a copy of brawl sold for roughly every 6 consoles. If the data from the 5 million article is correct, Brawl has sold almost as many copies as Mario Galaxy (840k~) in its first 4 days. I don't know how that compares to Melee within the same context, but it's still an impressive number anyway you put it.