Professor Layton vs. Pheonix Wright: Ace Attorney is a virtual novel exclusive to the Nintendo 3DS and incorporates a mix of adventure with puzzles. The game is a crossover between the Professor Layton puzzle series and the Ace Attorney adventure series; it is the work of a collaboration between the two different developers being Level-5, who created Professor Layton, and also Capcom, who develop the Ace Attorney games. It was published by Nintendo for Japan in 2012 and released world wide in 2014.
The game is set after the events of Phoenix Wright: Ace Attorney Trials and Tribulations where Phoenix Wright and his assistant is in London on business and is teleported to a city where he encounters Professor Layton. For Professor Layton the game is set between the events of Professor Layton and the Diabolical Box and Professor Layton and the Unwound Future; he and his assistant is investigating a strange book which teleports him to a mysterious city where he is informed that the Knight of the Inquisition are seeking the Great Witch Bezella. Pheonix Wright's assistant is falsely accused of being the witch so the team must set out to find the real Great Witch Bezella in order to save her.
The game is divided into different chapters which are all various lengths, some of these chapters are also separated into different segments and each chapter or segment of the game is an investigation or a witch trial.
The investigations contain puzzles and have similar mechanics to the ones seen in the Professor Layton series; the player must explore the environments to discover clues which are used to solve the mystery. During these sections, the player must also converse with other characters in the game and locate the puzzles which must be solved. Solving a puzzle will reward the player with Picarats which can unlock extra game content; solving puzzles with less mistakes will reward the player with more Picarats. Special Hint Coins can be found during investigations which are used during the Witch Trials to provide the player with hints about how they should progress.
During the Witch Trials, the player cross-examines witnesses with the goal of defending his assistant. The player's main task in these segments is to find contradictions in the statements the witness makes and then present this information at the end. Selecting the wrong information will remove a strike from the player, once the player loses all of their strikes the game is lost. The majority of Witch Trials only have one witness; several witnesses may need to be cross-examined during certain points of the game in “mob trials”. Evidence is saved in the Court Record which can be referred to at laser points in the game and used as evidence.
Once the game has been completed, bonus content is available for the player to download. There are short episodes for the player to complete which include new puzzles and are set one year after the game; these episodes regularly break the fourth wall and characters will reference game sale figures and the player. Additionally, there are special galleries which display concept art with comments from the character designer.
Discover the clues – Search the environment and talk to characters to find evidence
Puzzles – Complete the puzzles and earn points to unlock extra content
Cross-examine witnesses – Find the contradictions and present the evidence to find the truth
Unlock bonus content – Complete the game to find new puzzles, galleries and episodes
 Players Liked
- The art is unique
- Good music
- The gameplay variety
 Players Didn't Like
- The puzzles are simple
- Story has several plot holes
- The Investigations are not as fun as the Witch Trials
This game is also known as Layton Kyouju VS Gyakuten Saiban in Japan.