Hey! Pikmin save file

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The file format for a Hey! Pikmin saved game. Note: this comes from analyses of the .sav files generated by Citra.

Format

The save data is split into several blocks that start with 4-byte magic words.

SAVE

Offset		Length	Field	Notes
File	Block
0x0000	0x0000	4 bytes	Block magic word	Always SAVE.
0x000C	0x000C	4 bytes	Save data checksum	Calculated using this method.

NEWS

Offset		Length	Field	Notes
File	Block
0x0010	0x0000	4 bytes	Block magic word	Always NEWS.

OPTI

The player's preferences in the options menu.

Offset		Length	Field	Notes
File	Block
0x0020	0x0000	4 bytes	Block magic word	Always OPTI.
0x0024	0x0004	4 bytes	Unknown[unsure]
0x0028	0x0008	1 byte	Music volume	0 to 3.
0x0029	0x0009	1 byte	Sound effects volume	0 to 3.
0x002A	0x000A	2 bytes	Unknown[unsure]

PBUF

Offset		Length	Field	Notes
File	Block
0x002C	0x0000	4 bytes	Block magic word	Always PBUF.

PARK

Offset		Length	Field	Notes
File	Block
0x0080	0x0000	4 bytes	Block magic word	Always PARK.

MINI

Offset		Length	Field	Notes
File	Block
0x04A4	0x0000	4 bytes	Block magic word	Always MINI.

CRNT

Offset		Length	Field	Notes
File	Block
0x0588	0x0000	4 bytes	Block magic word	Always CRNT.

GAME

Offset		Length	Field	Notes
File	Block
0x09A8	0x0000	4 bytes	Block magic word	Always GAME.
0x09AC	0x0004	4 bytes	Unknown[unsure]
0x09B0	0x0008	4 bytes	Sparklium total	Values over 99999 will make the game assume it's just 99999
0x09B4	0x000C	44 bytes	Unknown[unsure]

EVNT

Offset		Length	Field	Notes
File	Block
0x09E0	0x0000	4 bytes	Block magic word	Always EVNT.

HELP

Offset		Length	Field	Notes
File	Block
0x0AE8	0x0000	4 bytes	Block magic word	Always HELP.

RINF

Offset		Length	Field	Notes
File	Block
0x0BF0	0x0000	4 bytes	Block magic word	Always 0xRINF.

RSLT

Offset		Length	Field	Notes
File	Block
0x0C2C	0x0000	4 bytes	Block magic word	Always RSLT.

SPER

Offset		Length	Field	Notes
File	Block
0x0C38	0x0000	4 bytes	Block magic word	Always SPER.

STRE

Offset		Length	Field	Notes
File	Block
0x0C48	0x0000	4 bytes	Block magic word	Always STRE.

PLRP

Offset		Length	Field	Notes
File	Block
0x0C90	0x0000	4 bytes	Block magic word	Always PLRP.

DATE

Time at which the save was made.

Offset		Length	Field	Notes
File	Block
0x0CE0	0x0000	4 bytes	Block magic word	Always DATE.
0x0CE4	0x0004	8 bytes	Unknown[unsure]
0x0CEC	0x000C	1 byte	Month	1 to 12.
0x0CED	0x000D	1 byte	Day	1 to 31.
0x0CEE	0x000E	1 byte	Hours	0 to 23.
0x0CEF	0x000F	1 byte	Minutes	0 to 59.
0x0CF0	0x0010	1 byte	Seconds	0 to 59.
0x0CF1	0x0011	11 bytes	Unknown[unsure]

TTDS

Offset		Length	Field	Notes
File	Block
0x0CFC	0x0000	4 bytes	Block magic word	Always TTDS.

WMAP

Offset		Length	Field	Notes
File	Block
0x0D08	0x0000	4 bytes	Block magic word	Always WMAP.

SAMI

Offset		Length	Field	Notes
File	Block
0x0D80	0x0000	4 bytes	Block magic word	Always SAMI.

Checksum

The checksum seems to be a CRC32 of the 0xd87 bytes that follow after the checksum (i.e. just one byte short of the entire remaining data), with crc32 as implemented by e.g. zlib.

The following python code can recalculate the checksum if the data after the checksum is modified:

import struct
from zlib import crc32

filepath = "radish0.sav"  # put the script in the same folder as the save file
with open(filepath, "rb") as f:
    header = f.read(0xC)
    chksum = struct.unpack("I", f.read(4))[0]
    
    data = f.read()

calculated_chksum = crc32(data[0:0xd87])
with open(filepath, "wb") as f:
    f.write(header)
    f.write(struct.pack("I", calculated_chksum))
    f.write(data)

Tools

• Hey! Pikmin save editor