So I made a new theme song.

Youtube Version:
Download Link: Jimmy Neutron Japanese Opening
A few notes on translation:
I really worked hard to make this as realistic and accurate as possible. I'm SURE there are mistakes (I only know a little Japanese), but hopefully they are minor. All of the main characters' name-spellings I lifted straight from the Japanese website, so if they're wrong, it's nickjapan's fault, not mine. I used transliteration software to approximate the names of the more minor characters - for those of you who don't know, katakana is used to write foreign words, and it doesn't include all English sounds, so sometimes the result is pretty ridiculous.
In the case of Jimmy and Cindy, I felt that their last names held enough significance that they should be translated as the actual Japanese word for Neutron and Vortex rather than just the katakana style sound-out. All of this resulted in the following translations:
-JIMMY: ジミー・ニュートロン, or Jimi Nyutaron - this is how Nickjapan translates it, but as I said above, I wanted to go for the REAL translation, which resulted in:
中性子 ジミー, or Chuuseishi Jimi (in this case and the next I put the last name first, like Japanese people do)
-CINDY: 竜巻 シンディ, or Tatsumaki Shindei (it'd be Shindei Vorutekasu if you spelled it straight out, without the translation of the word "Vortex")
-SHEEN: シーン エスタヴェズ, or Shi^n Esutavezu
-LIBBY: リビー フォルファカス, Ribi^ Forufakasu
-CARL: カール ュィゼル, or Karu Yuizeru
-GODDARD: ゴッダード, or Godda^do
-JUDY: ジュディ, or Judei
-HUGH: ヒュヮ, or Hyuwa
-BETTY: ベティ, or Betei
-NICK DEAN: ニク ディン, or Niku Dein
-SAM MELNICK: サム, or Samu
-PRINCIPAL WILLOUGHBY: ウィロビ 校長, or Uirobi-kouchou
-MISS FOWL: ファヮル 先生, or Fawaru-sensei
-KING GOOBOT: グボトゥ王, or Gubotou -ou
Fascinating, ne? I wanted to include more villains, but I ran out of time. Besides, Goobot is pretty much the "big bad" who started it all - and continued to influence the show during all 3 seasons.
Anyway, I hope you enjoy my little cultural foray.
~*Mara*~ = ^.^ =
P.S. This is dedicated to Mace-face, whose love of anime helped inspire me to do this.