Every DS game that used an accessoiry through the GBA slot is not compatible with the DSi. So this rules out a bunch of Guitar Heroes and the DS MP3-Player (yes, that exists) at least. Pretty sure there's more too.

The other way around this happens too, there were games that used some of the DSi's features DS didn't have, such as the two camera's and the advanced internet features. Those games weren't compatible with the regular DS. Don't know any names.

The GameBoy Color had exclusive games that couldn't be played on GameBoy yes, but a lot (if not most) of the GameBoy Color games could be played in black-and-white on the original GameBoy. So, while it was more common to have compatibility issues between GB/GBC the same thing exists on DS/DSi too. I guess the reason a lot of people seem to think GB and GBC are different consoles is because the latter has a very obvious additional feature over the GB, the colour-screen, while the additional features of the DSi aren't so obvious to the naked eye.

Well then NES excells for you , but I still think a game like Metroid Prime did a much better job for the time then Metroid. If you don't read the lores, you can basically ignore the story in MP, but the atmosphere and erie music make this game phenominal. You never get that feeling of isolation in Metroid, but in Metroid Prime you do.

alot of that is true, but the thing is that Ninty did release GBC as a different console. Im sure if we ask the higher ups it would be classified as such. Hell they list it as a seperate console.

that is a piss poor list of fighters. Tvs.C is good, but its not Marvel vs. Capcom3 or I would go so far to say SF vs. Tekken was better as well, both games did not appear on Wii. Guilty Gear was a port of an older game, DBZ same thing, KOF collection? the fact that we need a compilation of old ass KOF games tells me how sad the library is as a whole. PS360 got two NEW KOF games. and those old games are on PSN(not sure about live), Naruto on Wii cant even wipe Ultimate Ninja storm's ass. MK again another port, where was the new MK, hell where was MKvsDC? Castlevania was a terrible game. DBZ port again where were the new games?

No PS360 had more fighters by a country mile. Half those games you listed were ports of old games. I didnt even get into the BlazBlue, Dead or ALives, Tekkens, Soul Caliburs, freaking Street Fighter. and those are just retail. What about the online store? Skullgirls, Battle Fantasia just to name two. Not to mention the old fighters that got completly redone visuals and online components that actually add to the game. SSBB is the only thing that stands out, that was released in 07, thats pathetic, and even then the PS3 has an equivilant in that stlye of gameplay(its not better, but it is something). I mean the system doesnt even have a Street Fighter game, a fan of the genre Wii was horrible for fighting games, hell GC was better. 

I see that our gaming tastes are very different, then. I would never compare TvsC to SFxTekken, since the latter is one of the worst fighters of this gen while I find TvsC to be on the same level as MvC3/SFIV.  Guilty Gear wasn't a port, it was a multiplatform release, same as DBZ and MK. Clash of Ninja 3 is, IMO, the best Naruto fighter of this gen, Ultimate Ninja Storm's gameplay was simplified a lot when compared to Clash of Ninja. KoF, while being a collection of older games, had a few additions to the gameplay based on the newer games of the series at the time it was released, the fact that the games are old doesn't change their quality. Also, about Castlevania, most people didn't liked the game because it wasn't "Castlevania", but when looking at the game as a 3D fighter, it was a great one, IMO.

Anyway, there's absolutely no doubt that PS3/360 have more fighting games, but it's nowhere near "more fighters by a country mile". I doubt they have even 2x the number of fighters when compared to the Wii(that's if you don't count Arcade, Ultimate, Super, etc. editions of Capcom's fighters, otherwise they would probably have 3x the number of fighting games).

SFxTekken is not a bad game at all, dont let Capcom's DLC crap cloud your mind. Tvs.C is overrated to me. MK was not a multiplatform game as the original version was released on PS2 and xbox in 06 how the hell could it have come out the same time if the Wii wasnt even on the market, im kinda questioning how big a fan you are. Guilty Gear game on wii is simply an enchanced version of a game that had been out forever, and it was still a month later than PS2 version but just by a month, if we are going to count that then we have to count the multiple addtions of other fighters and that would make the HD list even bigger. Naruto, IMHO those games are bland but you must not have played the last ones because it is not simplified, you might be in the minority there. What editions to those games on the collection were made? I have it and there was none, i think you are making stuff up.  No most people didnt like Castlevania cause it was a crap fighting game, the fact that you like it tells me where your tastes lie. (nothing wrong with that) please lets not make excuses for bad games. Persona got a fighting spinoff and it was loved. 

It is twice the number even without the super/ultimate editions. The fact that there is NO Street Fighter or Tekken presence on the system makes it a joke to fighting game fans.