Editing Pikmin 2 save file

{{DISPLAYTITLE:''Pikmin 2'' save file}}
Data about the ''Pikmin 2'' save file format. The following info was taken from the US version of ''Pikmin 2'' based on a <code>.gci</code> save taken from Dolphin. This data applies to all GameCube versions of the game, the only difference being the region code on the 4th byte of the file

{{todo|Figure out how to decrypt save files for the NPC version}}

The save file contains save data for each of the 3 save slot used in-game. The data of such a save slot starts with the 8 byte magic word string <code>PlVa0003</code> and is <code>0xC000</code> bytes (49152 bytes in decimal) long. Directly after the string follows a byte which has the slot number of the save (<code>0x00</code> for first slot, <code>0x01</code> for second, <code>0x02</code> for third). The last 4 bytes of the slot data contain the checksum calculated for the preceding slot data. The checksum is detailed in [[#Checksum|this section]].

== Addresses ==
Addresses of interest relative to the start of the save slot (i.e. the start of the magic word string):

{| class="wikitable sortable"
! Address || Size || Description
|-
| <code>0x13</code> || 1 byte
| When this byte is set to 0 the save file is considered new
|-
| <code>0x14</code> || 4 bytes
| Integer representing the day count as shown on the file select screen (might not be permanent, i.e. overwritten when you end a day normally.)
|-
| <code>0x2C</code> || 4 bytes
| Integer representing the Poko count as shown on the file select screen.
|- 
| <code>0x30</code> || 4 bytes
| Integer representing the treasure count as shown on the file select screen. Usually the same as the amount of treasures as accessed on the Area Select Screen.
|- 
| <code>0x3C</code> || 4 bytes
| Integer representing the time (in minutes) played on the save file as shown on the file select screen.
|- 
| <code>0x53</code> || array of 2, 4 byte integers followed by a 1 byte bitmask
| 4 byte integer representing the count of enemies killed, followed by a 4 byte integer of Pikmin lost to the said enemy, followed by a 1 byte bitmask <code>0b1</code> representing that the enemy has been unlocked in the Piklopedia and <code>0b10</code> representing that the enemy has been viewed in the Piklopedia.
|- 
| <code>0x3E9</code> || 4 bytes
| Actual day count the game registers, differing from what is displayed on the file select screen if only one of the two addresses is edited. 
|- 
| <code>0x3ED</code> || 2 bytes
| Bitmask for Exploration Kit items and their activity. The least significant bit represents the EK item with an internal ID of <code>0</code> When the bit is set to 1, the item is active. This activity does not reflect the treasure being collected.
|- 
| <code>0x3F1</code> || 21 length 4 byte array
| Pikmin types that fall from the sky during entering and exiting a cave. Editing this value on a save file that is on the area select screen will result in the Pikmin falling from the sky upon entering an area. The Pikmin types are organized into groups of three, with the first integer representing a leaf Pikmin, the second a bud Pikmin, and the third a flower Pikmin. The Pikmin types in the array are ordered Blue, Red, Yellow, Purple, White, Bulbmin, and an unused PikPik carrot.
|-
| <code>0x479</code> || 21 length 4 byte array
| Same as above but for Pikmin in the Onions and Ship. When either Bulbmin or PikPik are added the total number of pikmin is increased however as they have no onions there is no way to access them.
|-
| <code>0x4CF</code> || 188 length 1 byte array
| 1 byte each represents the treasure as accessed on the area select screen. Treasures appear to follow their [[Pikmin 2 identifiers|internal IDs]] for order. These are all the treasures not part of the Exploration Kit (nor The Key). Non-zero values mean collected. 02 means that the treasure will appear with "New" in the piklopedia, while 06 means its old.
|-
| <code>0x58D</code> || 13 length 1 byte array
| Same as above, only for Exploration Kit treasures including The Key.
|-
| <code>0x7E7</code> || 1 byte
| Bitstream representing progress in Valley of Repose. If the least significant bit is set to 1 it plays the unlock fanfare next time the save is loaded. If the next bit is set to 1 then the fanfare won't play. {{todo|Figure out what the other bits control}}
|-
| <code>0x7E8</code> || 1 byte
| Used for the above ground treasure counter for the Valley of Repose on the map screen.
|-
| <code>0x7E9</code> || 1 byte
| Same as <code>0x7E7</code> but for the Awakening Wood.
|-
| <code>0x7EA</code> || 1 byte
| Used for the above ground treasure counter for the Awakening Wood on the map screen.
|-
|-
| <code>0x7EB</code> || 1 byte
| Same as <code>0x7E7</code> but for the Perplexing Pool.
|-
| <code>0x7EC</code> || 1 byte
| Used for the above ground treasure counter for the Perplexing Pool on the map screen.
|-
|-
| <code>0x7ED</code> || 1 byte
| Same as <code>0x7E7</code> but for the Wistful Wild.
|-
| <code>0x7EE</code> || 1 byte
| Used for the above ground treasure counter for the Wistful Wild on the map screen.
|-
| <code>0x834</code> || 4 bytes
| Actual Poko count the game registers, differing from what is displayed on the file select screen if only one of the two addresses is edited.
|}

== Checksum ==
The checksum of a save slot is calculated according to [http://hitmen.c02.at/files/yagcd/yagcd/chap12.html#sec12.5 this method].

[https://gist.github.com/RenolY2/e0d93dde832b63f9197ef60861f22d89 This Python script] (requires Python >3.4) assists with calculating the checksum for the data in a save slot. Not recalculating and fixing the checksum results in the game detecting the modified save slot as being corrupted (but if you have any unmodified save slots, those will still work fine).

Very careful editing might allow you to fool the corruption detection without having to recalculate the value: Due to the checksum being an additive one, {{unsure|if you increase one value by 1 and decrease a different value by 1, the checksum should still remain valid.}}

[[Category:Pikmin 2]]
[[Category:File formats]]