It was so good in graphics and physics, & what engine is that? Havok? Unreal 3? Rage? Crytek?id Tech 5? SMG 128? They should release it to other developer instead of letting them making crap games!

You do realize that not every developer builds a flexible game engine that can easily adapted for different kinds of games?  You also do realize that engines like that must be developed from the ground up with that concept in mind right?

Silly me, of course you do.  Your real question was probably "Why didn't Nintendo build an engine they could sell?"  And that, of course, is a question for Nintendo.

Brawl already has Havok physics (Galaxy doesn't) but it uses an entirely different graphics engine from Galaxy.

I've heard that Nintendo updated the SDK with what they learned on SMG, but I haven't checked it myself. Nintendo's business model is different to those like Epic. Nintendo develops their engines with only their own developers and games in mind. Epic makes games as a showcase for their engines, therefore they develop the engine with lot of support and flexibility.

I hated SMG so i am happy SSBB(my fav Wii game) doesn't have much in common with it

SMG used the Plumber engine, everyone knows that.

Nintendo (like most Japaneese developers) has their own internal tools and technology team which builds their 'engines' ...

Beyond that, Super Mario Galaxy has very different technical limitations that can be exploited than Super Smash Bros. which means that (although they're both very good looking highly detailed games) the impressive feature of one game may not be easily possible in the other game.

The only other thing to consider is that how hard a game really pushes the underlying hardware is heavily determined by the artistic directors desire to push the underlying hardware; if you think that the overall quality of Mario Kart Double Dash was good enough, and don't really see much of a need to produce noticeably better graphics you probably won't.

How much money did Ninty make from Galaxy? Well - say 6m units, and $30+ profit from each unit - $180m. And increasing weekly, by.. $1m per week?

Even if they sold their engine for $1m per license, license revenue would be miniscule compared to revenue from a quality game.

Compare that to the extra *competition*, and competitive advantage they would lose by giving their hard work away to competitors. Which translates into lost revenue from games like SMG.

...

Its no accident Nintendo's focus is primarily software development - it is bay FAR the easiest (and best) way to make heaps of $$$ in the games industry. No other company can touch them, by the quite literal country mile.

Nintendo creates specific engines for each of their top tier games, in order to optimize the performance of that game.

For example the Galaxy engine was mostly built around dealing with the gravity of the spheres.

The benfit is clearly that you don't have to put in stuff you don't use, so the power of the console can be fully used for the processes that matter.
Of course this is much more expensive.

Still, nobody know what is the name of the engine? I guess it will become a mystery and remain unsolved forever.