Wii graphics formats are fairly similar to the GC stuff (not so many tile editors with actual support even vs the GBA and DS but you can hopefully get it done) and much many of the same concepts come up from the wii and DS when it comes to wii formats (give or take things like sector addressing instead of file or memory level pointers although those can exist too).
The wii much like the GC also has a thing for LZW, LZH or YAZ0
http://www.amnoid.de/gc/yaz0.txt although RLE, more conventional LZ and LZ variations and Huffman can still poke their head in-
http://wiibrew.org/wiki/LZ77 being a nice wii LZ source. It is mainly for the GC but
http://hitmen.c02.at/files/yagcd/yagcd/frames.html is still useful.
Some more links
http://gbatemp.net/t286476-wiimms-szs-tools
I am not sure if there are many high grade assembly tools for wii hackers like there are for the othet consoles/handhelds so it is probably IDA pro (paid version, equally I am not sure who has the go to IDA module these days) or you try to abuse the homebrew stuff. Remember all commercial wii code at least runs on the PowerPC- only homebrew and IOS uses the ARM for anything real.
I have seen rad/bink video in wii isos and as well as criware (ADH, ADX and their video formats).
Extracting wii isos and insertion- these days wii scrubber every time for me.
http://filetrip.net/f4399-Wiiscrubber-Kit-...oader-1-40.html although many of the tools designed to rip isos for use with WBFS or other file systems will sort things for hacking type purposes as well- thinking things like
http://gbatemp.net/index.php?showtopic=182...t=0&start=0 if not.
Some people went in for some form of jump loader for use original discs but that is a different matter entirely.
It is not quite as important for wii discs but for Wiiware and the like U8 is worth knowing about
http://wiibrew.org/wiki/U8_archive
After that it is much like translating any other console/unknown format game although much like the DS the wii does make a fair bit of use of UTF/unicode of some form, shiftJIS, ASCII and other known text encoding formats.
