Theres been some discussion on what made GC underperform and it seems like it was due to letting PS2 have a big headstart, image as being too kiddy and many of its key franchises changed too much. So how would it have done if.....

Launch Sept 2000 in Japan, Nov in NA and Feb 01 in Europe. Change the appearance of the system to be more appealing like Wii or PS2 which were both slick, stylish and looked like it belonged under the tv instead of the kids room, this could help make it more appealing to teens/college students. Have the controller look like Wii U Pro Controller and maybe have it be wireless from the get go and sell additional controllers for $49.99. Key launch games could include Perfect Dark and Rogue Squadron (build from the ground up for GC instead of N64), Mario Party and Wave Race. Multiplat games like Tony Hawk, Madden, and others would appear. Due too earlier launch and wireless controller, the console would cost $279.99 at launch and could take sell well initially form PS2 shortages and slightly cheaper.

Throughout 2001 we could see games like Pikmin, Dinosaut Planet, Conker, Eternel Darkness, Resident Evil Zero, Luigis Mansion ans Smash Bros Melee and a price cut to $199.99 right before the holiday season. 2002 would have REmake, Star Fox Assault by Rare, Super Mario Galaxy, Metroid Prime. In May 2003 a price cut to $149.99 would be accompanied by New Super Mario Bros and Zelda Twilight Princess/Mario Kart would be the big holiday titles. 2004 would have Pikmin 2, Metroid Prime 2, Kameo, DKC Returns and Resident Evil 4. 2005 sees GC a price cut to $99.99 as sales slow down and people get ready for next gen systems.

If this were to have happened I believe GC could have gone on to sell over 40m with a few 10m selling games.

Good thought, I want to say that it might have even out performed the ps2 but I'd get killed on this site. 3rd party would have jumped on this a lot more if it did happen so who knows...

This is almost like asking what if dinosaurs had never gone extinct. Lol. You basically just potentially rewrote history with your what ifs.

I think a Dvd player + physical remodel would have made a huge difference in The west.

It'd be the best console ever (but only if it still has Tales of Symphonia)
But it would need a DVD player to outperform PS2.

If it had a built in DVD player and a "cooler" design it would've flown off shelves.

I think thats a bit of a stretch since PS2 had DVD and I think games like Final Fantasy, MGS, GTA would have stayed on PS2 due to disk space but something like PS2-125m, GC-50m, Xbox-25m could be possible

Yeah, I forgot about DVD... Throw it in though as well as the other points you mentioned then. I think it would have stood a decent chance.

I'd add two (three, really) more things to your revisions:

1 & 2) DVD player, as others have said. This means regular DVD discs instead of mini discs.

3) The first Zelda on GC kept an art style similar to the Spaceworld 2000 trailer instead of the drastic contrast that came in the form of Wind Waker.

With all those things, GC could have achieved 50 million easily.

The only reason I didnt include DVD is cuz I dont think they could have kept the cost of the system under $300 without pretty big losses and I included Twilight Princess in 2003 instead of Wind Waker

My bad, you did include it. I even read the original post before replying and forgot all about it.