Not sure why it's titled Knuckles in China Land, but it's a learning game to practice and learn Japanese Characters - Katakana, Hiragana, and Kanji or your Japanese, Indonesian, or German Vocabulary. Starring Knuckles, character from the Sonic the Hedgehog games, it's a traditional RPG, where instead of fighting monster you battle vocab and conquer japanese writ(characters). Game Library contains thousands of characters and words, also comes with a Vocabulary Editor to add slang.