But sending a 480i signal (Wii + the cables it comes with) to an HDTV will result in almost certain lag.
but why, when it isn't in EDTV or anything?
would I Have to buy the other red/blue/green cables?
-Basically the problem with that is "upscaling".
If a tv only displays in 720p, 1080i, or 1080p, and you feed a 480i signal to it it has to upscale the picture. By that I mean that the tv takes the 480i signal and turns it into a 720p,1080i, or 1080p sginal (depending on the tv). After all if it didn't do this only 480 of 720/1080 lines would be filled and the resulting image would be tiny. But the thing is that upscaling can take time, which results in lag.
(btw what kind of tv are you using right now? I forgot to ask that :X )
-If you do have an HDTV, getting component (red/blue/green) cables is essential, and will cut down on lag, probably by a large amount.
This is because upscaling takes place in two step: "i -> p upscaling" and "480 -> 720/1080 upscaling." By getting component cables and enabling the wii to output in 480
p you can skip the i -> p step (which is more time consuming).
-EDTV's are actually perfect for Brawl because they only output in 480p or 1080i. So if you set said tv to output in 480p no upscaling, and thus no lag, is involved. Same goes for SDTV's, which output in 480i, and thus don't have to (and can't) upscale anything.
If you want more info look in this thread right here:
http://smashboards.com/showthread.php?t=130287
I hope all of that made sense, this stuff is pretty confusing
EDIT: after reading your post again it sounds like you might be confused about the terms.
HDTV = High Definition TV; outputs in 720p+ resolution
EDTV = Enhanced Definition TV; outputs in 480p resolution. Some can output in 1080i res.
STDV = Standard Definition TV; outputs in 480i. Just your standard tv.
EDIT2lol Note that the big focus here is what the tv outputs in, not wether or not it's an HDTV. All HD flat panels (LCD, PLASMA) output in only one resolution, so they will have to upscale a lower rez signal. Some CRT's can output in multiple resolutions though, so, for an example, if you have a CRT HDTV that can output in 480p you're good to go.