Now for the specific suggestions (part 1 of 2, part 2 will follow later)
I'll use "original phrase" → "my suggestion" or "original phrase" ← "my remark on it" format.
* There should not be a full stop at the end of "cartoon works streaming through internet."
* "and history on it." → "and its further history"
* "Let's move forward."
* "*End of September-October, 2004. Wata unveiled it in 2-channel" → "At the end of September-October, 2004. Wata unveiled it on 2-channel"
* "Wata is also a 2-channel user, unveiled it in 2-channel." ← This sentence is not really needed anymore, you said the same above already.
* " Most of 2-channeller preferably enjoyed this movie in which shows Monar and his friends dancing." → "Most 2-channellers enjoyed this movie in which Monar and his friends were shown dancing."
* "has released O-Zone CD entitled of Dragostea din Tei." → "has released a CD by O-Zone entitled "Dragostea din Tei.""
* "bonus truck" → "bonus track"
* "comparing to the original" → "compared to the original"
* "but still characters shown and parodied words were constructed basically the same." ← Why isn't all of this in red?
* "Especially the principal character named "Noma-Neko"." → "Especially the main character named "Noma-Neko"."
* "A beloved character which has been brought up in BBS, virtual internet world has been kidnapped as an "original" of profittal enterprise!!" → "A beloved character which has been brought up on a forum in the virtual internet world has been kidnapped as an "original" of profit based enterprise!!"
* "But most of all were quite much raged." → "But most of all, they were quite outraged."
* "There was even some who started asking AVEX on it." → "There were even some who started asking AVEX about it."
* "response from AVEX were as follows" → "response from AVEX was as follows"
* "It is the same that 2-channel character and Noma-Neko are not the same." → "In the same way, 2-channel character and Noma-Neko are not the same, either."
* "MUZO has announced" → "MUZO announced"
* "Many could not see what this statement exactlly means." → "Many could not see what this statement exactly meant."
* ""Nothing to say at this moment." was only reply we could get from AVEX." → "No comment at this time." was the only reply we could get from AVEX.
* "And at night on September 8, 2005, an article titled "About copyright of Noma-Neko" was added on an official internet shopping website of AVEX." → "And at the night of September 8th, 2005, an article titled "About the copyright of Noma-Neko" was added on the official internet shopping website of AVEX."
* ""Noma-Neko" was born to be "inspired" by ASCII Art characters" → ""Noma-Neko"'s creation was "inspired" by ASCII Art characters"
* "often seen on internet BBS such as Monar and so on." → "often seen on internet fora, such as Monar, etc."
* "Noma-Neko is completely different character from Monar and Mo-lala." → "The Noma-Neko character is completely different from Monar and Mo-lala."