Final Fantasy X-2/Mi'ihen Mystery

The main portion of this mini game happens during Chapters 4 and 5. However, set up for it can start as early as Chapter 1.

During Chapter 3, a hover crashes over a bridge and the machina, which were supposed to be protecting travelers, riot. Speaking with Rin during Chapter 4, he asks Yuna to use the CommSphere network Shinra set up and some extras he has placed to find clues and discover how this could possibly happen. When you do discover something suspicious, give him a call and he will investigate. When enough clues are found, Rin will report that he will be taking over the investigation and thanks Yuna for her help. The results will be unveiled while visiting the Mi'ihen Highroad during Chapter 5.

There are five possible suspects you can pin as the culprit. Rikku, Calli, the Prophet, a small Chocobo Eater, and Rin. You determine which one by which events you view during the game and what events you call Rin in to investigate.

Suspects

To insure all suspects are available to you, make sure to witness these events while traveling the Mi'ihen Highroad between Chapters 1-3.

Chapter	Event
Chapter 1	Talk to the female Al Bhed technician training machina at an alcove near the southern end of the Mi'ihen Highroad.
Chapter 1	Visit the Oldroad to view a small Chocobo Eater running away.
Chapter 1	Speak with the Prophet near the Mushroom Rock Road entrance.
Chapter 2	Participate in the Cuckoo for Chocobos mission. The outcome determines whether or not Calli or Rikku are possible suspects.
Chapter 2	Complete the Cuckoo for Chocobos mission and then return to the Mi'ihen Highroad. Visit the Travel Agency and look for Rin as he walks past Yuna and out the door.
Chapter 3	Participate in the Machina Mayhem mission. To add Rin to the list of suspects, decommission more machina than the Al Bhed.
Chapter 3	Complete the Machina Mayhem mission, and then return to the Mi'ihen Highroad(Location: Newroad, North). Look for Shinra along the road to watch him installing a CommSphere in a strange location.

Which suspect should you go after? That is up to you. Listed below are the benefits of catching each culprit and which events to view to set them up.

Chocobo Eater

Easiest to catch as the culprit. No work really has to be done to blame him. Chocobos will become available on the Mi'ihen Highroad after catching him, however no extra items will be awarded.

• View the events during the CommSphere Investigation that give him the most points. These include event A and D during Stage 1. B and G during Stage 2.

The Prophet

Possibly the funniest end of episode scene (depending on your humor), done in a "Scooby Doo Mystery" style. Staring YRP as the meddling kids. You don't receive any extra items for blaming the Prophet. Chocobos don't become available on the Highroad and 100% completion toward the perfect ending cannot be achieved.

• View the events during the CommSphere Investigation that give him the most points. These include event C and I during Stage 1. C, E, F, I, J, L, and M during Stage 2. A, H, and I during Stage 3.

Rikku

If Rikku is the suspect, the end of episode scene can be considered amusing. Chocobos become available on the Highroad and you receive the Ragnarok accessory.

• During the Cuckoo for Chocobos mission, Don't catch the chocobo until the third stage. This allows you to view a scene in which Rikku jumps from the top of the Ruins and falls on her backside.
• After completing the Cuckoo for Chocobos mission, return the Mi'ihen Highroad and invite Calli to board the Airship Celsius.
• View the Stage 1 Event B, and Stage 2 Event K during the Commsphere investigation.

Calli

Chocobos will be available on the Highroad, however you will miss out on the reward from the Cuckoo for Chocobos mission.

• Do not complete the Cuckoo for Chocobos mission. Decide not to help Calli after visiting the Mi'ihen Highroad during Chapter 2 or fail the mission.
• Do not invite Calli on board the Airship Celsius.
• View CommSphere investigation events E and F during Stage 1. Events A and D during Stage 2 and events C and E during Stage 3.

Rin

Hardest suspect to catch. Chocobos will be available to ride for free and you will win Gippal's Sphere. However 100% completion toward the perfect ending cannot be achieved.

• During Chapter 1, make sure to speak to the female Al Bhed technician training machina in an alcove at the southern end (before the Travel Agency) of the Mi'ihen Highroad.
• Complete the Cuckoo for Chocobos mission during Chapter 2. Return to the Mi'ihen Highroad and enter the Travel Agency to view Rin walking past and exiting the building.
• Defeat 7 or more machina in the Machina Mayhem mission during Chapter 3. Rin should be in the crowd at the mission end scene if you are successful.
• Call for Rin during Stage 1 event G when investigating with the CommSpheres.
• During Stage 3 of the CommSphere investigation, witness clue event G -don't report to Rin yet-, switch to the Newroad CommSphere and witness event D immediately afterward to view the scene and then report.
• After completing the previous step, view a CommSphere where no events are happening and call Rin five times. He should get irritated and eventually won't come running when you call for him. Take no further steps until Chapter 5.

CommSphere Investigation

There are 8 CommSpheres set up along the Mi'ihen Highroad.

• Travel Agency, Front
• Travel Agency, Back
• Ruins
• Newroad
• Hover Crash Site
• Oldroad Interior
• Shira's CommSphere
• Highroad North Entrance

The actual investigation during Chapter 4 is divided into three parts. Rin will inform you when he has moved on to the next stage by telling you that you are getting to the heart of the matter. While viewing events on the CommSpheres, if you want them to count toward the investigation, make sure to call Rin over.

In order to move on to the next stage, you must have viewed so many events toward a suspect. This gets especially tricky when trying to implicate Rin as the culprit. Use the below chart to figure out the number of events to witness per culprit before you can move on.

Events needed per at least one culprit to move to the next stage
Stage	Culprit
	Rikku	Calli	Chocobo Eater	Prophet
Stage 1	2	3	3	3
Stage 2	2	3	3	4
Stage 3	2	3	2	3

These tables describe each event that can be viewed during the CommSphere investigation and what is needed to view that event. In each event requisite, if a stage isn't noted, the event that is is during that stage.

Stage 1
Event	CommSphere	Description of Clue	Requisites	Points Awarded Toward Culprit
				Rikku	Calli	Chocobo Eater	Prophet	Rin
A	Travel Agency, Back	A small Chocobo Eater appears to be playing with the Drone console.	None	0	0	+4	0	0
B	Ruins	A machina is malfunctioning.	Play events to set up Rikku	+6	0	0	0	0
C	Newroad	The Prophet is meeting with a young woman.	Call Rin during event I	0	0	0	+4	0
D	Newroad	A small crowd is gathered on the bridge.	None	+6	+4	+4	+4	0
E	Hover Crash Site	A Chocobo feather floats in the air.	View event F first	0	+4	0	0	0
F	Oldroad Interior	Calli is looking for something.	Play events to set up Calli	0	+4	0	0	0
G	Shinra's CommSphere	Rin is talking to a strange Al Bhed woman.	None	0	0	0	0	+
H	Highroad North Entrance	The Prophet is seen with the Chocobo Eater.	View event A or C	0	0	+4	0	0
I	Highroad North Entrance	The Prophet is speaking to a mysterious person.	None	0	0	0	+4	0

Stage 2
Event	CommSphere	Description of Clue	Requisites	Points Awarded Toward Culprit
				Rikku	Calli	Chocobo Eater	Prophet	Rin
A	Travel Agency, Front	Rin and Calli are in front of the hovers.	Play events to set up Calli and view Stage 1 event E.	0	+4	0	0	0
B	Travel Agency, Front	The Chocobo Eater is chasing a gull.	None	0	0	+4	0	0
C	Travel Agency, Back	A strange woman is checking out the Drone console.	None	0	0	0	+3	0
D	Travel Agency, Back	Calli is waiting around for someone.	Play events to set up Calli and don't call Rin during event C	0	+4	0	0	0
E	Travel Agency, Back	An Al Bhed technician is playing with the Drone console.	None	0	0	+3	0	0
F	Ruins	The Prophet is having another meeting.	View event C first	0	0	0	+3	0
G	Newroad	The Chocobo Eater is chasing a Hover.	None	0	0	+4	0	0
H	Hover Crash Site	A group of machina surround the crashed hover.	None	+6	+4	+4	+3	0
I	Hover Crash Site	The Prophet hides something at the crash site.	View event J first	0	0	0	+3	0
J	Oldroad, Interior	The Prophet is talking to two men.	View event F first	0	0	0	+3	0
K	Shira's Commsphere	N/A	Attack the machina on the opposite ledge during the Machina Mayhem mission	+6	0	0	0	0
L	Highroad North Entrance	The Prophet is speaking with a young lady.	View event F first	0	0	0	+3	0
M	Highroad North Entrance	The Prophet hides something in the ruins.	View event L first	0	0	0	+3	0
N	Highroad North Entrance	Rin finds the item the Prophet hid.	View event M first	0	0	0	+3	0

Stage 3
Event	CommSphere	Description of Clue	Requisites	Points Awarded Toward Culprit
				Rikku	Calli	Chocobo Eater	Prophet	Rin
A	Travel Agency, Front	Rin is talking to the hover driver.	View event H first	+6	+4	+6	+4	0
B	Travel Agency, Back	A man falls from the roof.	None	+6	0	0	0	0
C	Ruins	A young woman is waiting by the ruins.	Erased if event I is seen first	0	+4	0	0	0
D	Newroad	Rin is doing something strange near the crash site.	View event G first - Event is erased if you see another first	0	0	0	0	+
E	Newroad	Calli tries to hide something.	Play events to set up Calli	0	+4	0	0	0
F	Hover Crash Site	Rin finds something in the wreckage.	None	0	0	+6	0	0
G	Hover Crash Site	The CommSphere malfunctions.	None	0	0	0	0	+
H	Oldroad Interior	Rin talks to two men.	None	0	0	0	+4	0
I	Highroad North Entrance	The Prophet and his assistant meet.	None	0	0	0	+4	0