The other larger addition is an element called the “Psyche-Lock”. If you encounter somebody during Investigation mode (i.e. out-of-court) who is hiding information, a number of locks will appear around them. You can break these locks and uncover the truth by presenting relevant pieces of evidence, much like in court. Unlike in court, you are allowed to stop at any time you feel that you don't have enough information to break all of the locks. This new system spices up your investigating, and really helps to keep the game fun.
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<i>Justice For All</i> is, like its predecessor, plagued by an unfortunate amount of translation errors. While it is always clear what the writers intended to say, the game is full of small typos such as using the word “alter” when it should be “altar”. It isn't anything game-breaking, but it is distracting to some people. Considering that the Japanese version of the game contained a full English translation when it was released months ago, there is no excuse for there still being typos. I can understand the translators making a few errors if it meant rushing the game out the door to get it released as soon as possible, but it appears that this is the exact same translation that Japanese gamers were playing back in October. I do have to add in, though, that there are a lot of great things about the translation; a lot of internet memes and other geek jokes have found their way in, and I for one appreciated the attention to detail the translators put into gearing the translation to their audience, even if they did ignore grammar and spelling.
Like the first <i>Phoenix Wright</i>, it is blatantly obvious that <i>Justice For All</i> is a port of a Game Boy Advance game. The two-dimensional graphics are simplistic and lacking in complex animatio. While there certainly wouldn't anything wrong with shinier graphics, I frankly didn't care. <i>Justice For All</i> is about the storytelling and the puzzles, neither of which really suffers from the simplistic presentation. It would have been nice to see the game take advantage of the DS, as the bonus fifth case of the first <i>Phoenix Wright</i> did, but for that I guess we will have to wait for the fourth DS-specific entry into the series, should it eventually make its way to the United States.