We all know that there are alot of ps2 ports on the wii where the game is made first on the ps2 then ported to the wii. Why don't they just do it the other way though. I would think it is easier to just downgrade it from what the wii has to the ps2. It would also give the wii game better graphics and make them think more on the controls. If they are going to make a version of the game for the WII and PS2 and another for the 360 and PS3 at least make it on the wii first.

Edit: Oops I just notice my title sucks. I mean the games made for both no matter what not the actual games that are Wii execlusives. Just in case somebody gets confused. A better title would be " Why aren't ps2/wii games made on wii first"

or why doesnt sony let it die, discontinue it, now that way they can focus on the wii and not the wii and ps2,

This is harming the wii remember. Doesn't sony compete with the wii? I think it is more of the developers choice on if they want to make games for the ps2. 

Which brings back the question, Why dont they port from ps3 to 360? If the result would be having a better game on both platforms?

They actually do, sometimes!

Like with Rayman Raving Rabbits, or eehrm... There are a lot of games that sell like crap and were intended as Wii-exclusive titles but ended up on the PS2 too, because of the monstrously huge userbase!...

 That is obvious. Developing for the cell is harder than I guess just switching the code to work on the cell. Most ports I think are made on pc anyway then ported to the 360 and ps3. 

Ghostbusters PS2 version is a port of the Wii version

really? i thought it was the other way

ps2 port to the wii

Poor Wii. Littered with pathetic developers and crappy ports. Soon hopefully the cosmic balance will be restored and the PS2's time will pass. Then the high quality 3rd party support can begin.

Some legit developers will work ground up on Wii but a lot of ppl get lazy and the ones with the quick cash-in mentality taking advantage of the Wii's userbase for easy sales will just do it on the PS2 since they've been working on that for years and probably have both experience/better engine tools to work off of.

It's a shame since part of what's holding back the Wii is how it's not a massive leap from the GC spec wise. Which means developers who got used to the GC should be able to feel right at home with the Wii but then again the GC wasn't exactly known for massive third party support.