Will the 3DS version hold back the Wii U version? Perhaps. But can it? Definitely. At this point, a character's entry to the game isn't an issue anymore. The 3DS version holding back the Wii U version will merely limit the creativity of the developers they want on both versions, and that's all to it. We also haven't seen how these multiple AI characters run on the 3DS version. This could all mean that it'll limit the characters' potential for having a good moveset, for example.
I do, however, want to correct on what you've said wrong.
First, cartridge size has nothing to do with all of this. They handle memory size, not technical data, so we don't have to worry how many characters, stages, songs, modes, and other content both versions will have. The 3DS version can have everything Brawl has, but the graphics and performance? They will be dumbed down because the 3DS can't handle all the big details while running the game, which will be explained below.
Second, the 3DS is only more powerful than the GameCube and Wii in terms of GPU power, not CPU. The 3DS's graphics allow games to easily look like PS3 and Xbox 360 games mostly due to the use of programmable shaders, as seen in many 3DS games today. The small screen and low resolution also help to make them look good considering they can hide low resolution textures.
But the CPU and performance? The 3DS, compared to the GameCube and Wii, already has inferior polygon count to begin with. If you were to increase the amount of polygons a model has, you're just making the game run worse. The quality of the graphics sacrificed determines what the performance will be. There's a reason why Kid Icarus: Uprising only runs at 30 FPS with frame drops: the game sacrifices the amount of polygons, texture details, animation quality, and other graphics in order for more action and enemies to appear on screen.
Oh, but there's Mario Kart 7, which runs at a solid 60 FPS with a lot of AI on screen. But did you know the game features very low polygon count, low quality textures, low quality animations, no character interaction while racing, and even less chaos compared to previous console Mario Kart games like Mario Kart Wii, which featured rubber banding and an unbalanced item system? There was a reason why Mario Kart 7 was balanced—items appear less, slower Bullet Bills, slower Stars, slower Mushrooms, and etc—and that was all presumably to make the game run smoothly.
Ok i guess it is my turn. First of all the 3ds has a dual core
CPU: 266MHz ARM11, while the gamecube has a single core CPU: 485MHz IBM Gekko PowerPC. I won't get all technical, but DUAL CORE IS BETTER. The cores are clocked at a lower frequency, but the two cores are still more effective. Your first point is pointless.
Secondly, Kid Icarus Uprising doesn't have frame drops, even in multyplayer. It's never 60 fps, but it always runs more than smooth. I've played more than 250hours of that game, so i'm pretty sure my opinion has some weight on the issue. You've probably only seen the game on screenshots, because the game looks Gorgeous. It doesn't have the highest polygon count, but it looks really good on the 3ds's screen itself.
Mario Kart 7, yet again looks pretty good(it doesn't matter if polygons are lots or not, if it looks good on the system!). I don't know where you've heard there is no character interaction while racing, because that is NOT TRUE( i would've noticen with my 80 hours playing). Items did not appear less, Bullet bills propelled you to first position before( that was on the DS...they were faster there...is it more powerful) ...balancing.
It seems like you've based all your points on things you've read and screenshots you have seen. Trust me, things are always different whit the real deal in your hands. Does the 3ds have limits? Hell yes, if Sakura want's to make a Wonderful 101 character with all 101 in the same time, then yes 3ds version will hold back the WiiU one. Would he do it? Probably not. The WiiU version has it's limit's too, they are a lot lowe(or higher?) than the 3ds, yes. But, for a game such as Smash Bros, the 3ds is equipped more than well enough to handle the game.
Also we have Olimar confirmed, and he is an Npc using character with more NPC's than IC, and in it's current state the game looks on par or even Better than Melee(on a small screen of course).
PS-it's normal for games to have lower polygon count and less detailed textures when they are on a handheld...
PS2- i'm not trying to be an A-hole or outright disregard your opinion and points. I'm basing mine on my experience of the system, which is a lot more reliable than anything else. For any other kind of game, maybe like X, Wonderful 101 and such, the 3ds definitely won't be able to keep up. But for a 2.5d fighting game, we won't have any major setbacks.
Yes, but this is without a doubt the most anticipated game of 2014. Even if they were going to spend more with the 8GB cart, you know that they would use every bit of space on that thing, and it will sell like crazy once release hits, so there's virtually no way they wouldn't make money on using the 8GB cart. And even if they did lose money on it, Nintendo has made so much bank that they could suffer huge losses for years and still remain in business.
Haha Yeah for Smash they would spend a bit more money. Look at Brawl, they put it on a dual layer disc, i think that is the only game using one.