In the fourth game of the series but the first developed specifically for Nintendo DS, players star as rookie defense attorney Apollo Justice.
He may be young and inexperienced, but Apollo’s confident manner and passion, coupled with his unique ability to uncover witnesses’ lies by studying their body language, will prove invaluable assets in the courtroom as he pleads the case for the defense. Thankfully, Apollo is not alone and is aided both in and out of the courtroom by his assistant Trucy, a mysterious female magician. Apollo also receives invaluable advice from his mentor, the ultra-cool Kristoph Gavin, whose perfect logic and natural instincts have won him numerous cases and the respect of his colleagues. Facing Apollo across the courtroom is the highly talented and flamboyant prosecutor Klavier Gavin, younger brother of Kristoph, who, in addition to being a legal genius, is also lead singer with Gavinners, a highly successful rock band with a string of hits to their name.
The fourth episode in the Ace Attorney series marks the debut of Apollo Justice and the first game designed completely for the Nintendo DS.