[[quoteright:256:http://static.tvtropes.org/pmwiki/pub/images/Professor_Layton_and_the_Eternal_Diva_Poster_1995.jpg]]
[[caption-width-right:256:Every puzzle has an answer.]]

''Professor Layton and the Eternal Diva'' is the first feature-length movie featuring Level5's popular gentleman, ProfessorLayton, and his KidSidekick, Luke. [[{{Level 5}} Level-5]] announced that they hope to produce more.

After solving the latest Don Paolo caper, Professor Layton puts on a record, sung by his former student Janice Quatlane. The Professor and Luke recount a case she involved them with three years ago, when she invited them along to an opera at the Crown Petone opera house. After the show, the guests are flung into a dangerous game, where the prize is said to be ''eternal life''. Meanwhile, a series of disappearances hits London, with young schoolgirls going missing. The Professor's assistant Emmy goes about investigating.

The movie is currently available in Japan and the United Kingdom; Creator/VizMedia has released the US version.
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!!Tropes in the movie
* ActionGirl: Emmy.
* AtArmsLength: Luke really does try to protect Janice but when faced with mooks, he runs afoul with this trope. And yes, he does try kicking at them.
* {{Atlantis}}: Or in this case, the lost kingdom of Ambrosia. When their queen died, the people of Ambrosia drank the Elixir of Eternal Life and vanished along with their kingdom to await the day when she would return.
* BatmanColdOpen: The movie starts with Layton and Luke coming to the end of an investigation regarding Big Ben, set during the time-frame of the original trilogy while the story proper is implied to take place after ''Last Spectre''.
* BrainwashedAndCrazy: [[spoiler:The wolves. And possibly the sharks too.]]
* BigDamnHeroes: Emmy and Grosky.
* ButNowIMustGo: At the end, [[spoiler: Melina decides that she can no longer keep living through Janice, bids everyone farewell, and peacefully passes on.]]
* TheCameo: In the theater, you can catch a glimpse of Mr. Beluga from ''[[ProfessorLaytonAndTheDiabolicalBox Pandora's/Diabolical Box]]'', and later you can see him and Babette (also from ''Pandora's/Diabolical Box'') [[spoiler:having got off the submarine]].
** The Elysian Box (again, from ''Diabolical/Pandora's Box'') can be seen next to the TV when Emmy is at Dr. Schrader's house.
** Claudia, the cat from ''Curious Village'' (or at least a [[{{Expy}} near-identical cat]]), can be seen curled up on the couch at Nina's house.
** Flora's extremely brief appearance during the opening of the movie amounts to barely more than this.
*** Don Paolo, Chelmey and Barton also appear in this scene.
** Stachenscarfen is seen walking past Janice in the rain while she narrates her letter.
** Granny Riddleton is seen sitting at a table next to Janice's in the cafe.
** Sammy Thunder (From Diabolical Box) is in Layton's class during Luke's introduction.
* ComedicUnderwearExposure: Grosky uses his trousers as a flag to attract a rescue plane.
* ConspicuousCGI: EVERYWHERE! Sure it's in the games, but it's very noticeable in a movie.
* CutLexLuthorACheck: In order to find the proper test subject, the BigBad built a cruise liner, with an opera house on it, and filled it with historical artifacts. And then blew it up. To get ''one'' test subject. That's a very expensive plan, especially since he had no way of knowing whether or not the experiment would work on the subject he got a hold of. Also, the giant fortress which [[spoiler: unfolds into a stories-tall battle mecha with saw blades, missiles, crab claws, flailing hoses and spider legs, all with a giant pipe organ on top]], which is only for [[spoiler: playing the song to reveal the secret of immortality]]. And the brainwashed wolves and sharks. That's some serious security for a deserted island. Then there's the mashup pipe organ which secretly [[spoiler: can copy a person's mind into another person]]. f you can do that, who needs [[spoiler: immortality]] anyway? In retrospect, the giant opera house/cruise ship full of treasures and puzzles [[spoiler: held absolutely no relevance to the villain's plan whatsoever]]. On the contrary, it's what brought Professor Layton and Luke in to begin with, which is basically BEGGING for your plan to be DOOMED.
* DeathsHourglass: [[spoiler: The Detragan has a series of lit candles that periodically go out, one by one. These mark how much longer it can continue to store the imprint of Melina's mind before it disappears for good.]]
* DisneyVillainDeath: [[spoiler: Descole... except that they NeverFoundTheBody.]]
* EasilyForgiven: Averted. After the climax, [[spoiler: Grosky arrests Mr. Whistler for kidnapping schoolgirls in an attempt to bring back Melina. [[PetTheDog He at least gives him, when asked, the chance to play the Detragan one last time in her memory]].]]
* EarlyBirdCameo: Bonus contest from Last Specter shows promotional art for this. This trope is averted in U.K in which Eternal Diva was released first.
* EvilOverlooker: [[spoiler: Descole in some regions.]]
* ExactWords: [[spoiler: What the Eternal Life amounts to. You get eternal life... in the sense that you allow someone ''else'' to live eternally through you.]]
* FramingDevice: The Professor and Luke are remembering a case that happened three years ago while listening to a record.
* [[spoiler:GiantMecha: In the climax of the movie, the castle turns into one.]]
* GoingCommando / NakedPeopleAreFunny: Grosky loses his underwear midway through the movie.
* [[spoiler:GrandTheftMe: The actual means of the "eternal life" everyone's fighting over, and it only applies to Melina anyway.]]
* GroinAttack: Emmy gives one of these to the mooks.
** ShareTheMalePain: Grosky cringes and covers himself protectively when he sees it.
* ImpossiblyLowNeckline: Grosky. No, really.
* InformedAbility: Amelia is apparently a superb chess player; sadly, the plot provided no opportunity to show this particular skill.
* InspectorLestrade: Chelmey has a small appearance at the beginning, and Inspector Grosky fills this role for the rest of the film.
* IronButtMonkey: Grosky.
* LetsGetDangerous: Of all people, it's [[KidSidekick Luke Triton]] who gets the most badass scene in this entire film, risking his life in a frankly suicidal attempt to save Janice.
* LockingMacGyverInTheStoreCupboard: Professor Layton builds an auto-gyro from parts found in a toolshed while escaping from some wolves.
* MeaningfulName: The kingdom of Ambrosia, rumored to hold the secret of eternal life, is named after the food of the gods in GreekMythology that gives its eater ageless immortality.
* MusicalSpoiler: When the Crown Petone [[spoiler:departs from port]], anyone who's played ''Last Specter'' or ''Miracle Mask'' will recognize whose theme is playing.
* MythologyGag: The film is like watching someone play a Professor Layton game, with the plot being based entirely around solving puzzles and a music player that plays the puzzle tunes among other things. Despite there only being 4 puzzles in the film, they're still numbered 001-004, just as they would be in a ProfessorLayton game. We're also treated to a taste of Layton's "famous intuition," when the screen goes dark and he arrives at an idea within moments.
* OmniscientMoralityLicense: Professor Layton deliberately allows people to incorrectly answer some puzzles - after being told that the punishment for such failures is death. The BigBad ''was'' lying, but how exactly did Layton know that?
* OnceMoreWithClarity: After the reveal that [[spoiler:Janice was actually Melina]], several scenes from earlier in the movie are replayed, but with [[spoiler:Melina shown in Janice's place.]]
* PipePain: Layton fights Descole with a pipe.
* PrecociousCrush: Luke very clearly has one on Janice.
* ReachingTowardsTheAudience: Professor Layton is pointing towards the viewer in the official poster.
* SplitPersonality: The Detragan unintentionally causes this as it's [[spoiler: supposed to have Melina take over the girls' personalities. The fact that there isn't a good match forces Melina out when the host remembers herself. Interestingly, the father got so desperate, he was willing to use [[GenderBender Luke]] as a subject.]]
* TheCoatsAreOff: [[spoiler: Descole flings his cape off in the sword fight between him and Layton.]]
* TheReveal: [[spoiler: The game for eternal life is false and is just a way to find young girls who could, by the thanks of a machine, have their own minds replaced with Melina's memories and personality. The fact that it worked on the first subject, Janice, who willingly gave herself up to Melina, and the fact that Melina is necessary to bring back the legendary Ambrosia, is the real reveal.]]
* ThereCanOnlyBeOne: The gift of Eternal Life can only be given to the one that passes all the challenges. [[spoiler: However, as stated above in TheReveal, it was all just a ruse to get Amelia to take on Melina's memories.]]
* SayMyName: "''LUUUUUUUKE!''" "''LAAAAAAAYTOOOOON''"
* ShowWithinAShow: The opera Janice stars in.
* StylisticSuck: What little we see of the opera isn't ''bad'', per se, but all the songs have the same melody, and the vocals don't sound much like opera.
* TragicKeepsake: Janice's pendant, which Melina gave to her right before she died.
* UnskilledButStrong / WeakButSkilled: Grosky and Emmy, when compared to each other. Grosky pounds through the {{Mook}}s with brute force, but Emmy never gets hit.
* UnwittingPawn: Poor Amelia probably thought she was terribly lucky to have been chosen for a free ticket to the opera.
* VillainousBreakdown: [[spoiler: "If the door to Ambrosia will not open by this music, I will TEAR IT DOWN!" Descole]]'s mentality just goes downhill from there.
* YouKeepUsingThatWord: The [[ShowWithinAShow play within the movie]] is always called an opera, but what little we hear of the vocals is far from operatic.
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