Entralink Forest Data Structure

The Entralink Forest data area has 2132 (0x854) bytes

Save Offsets
BW	0x22C00
B2W2	0x22A00

Encryption
The initial seed is taken from the data at 0x84C.
New seeds are calculated via LCRNG.
The upper 16 bits are XORed against the data to encrypt/decrypt (words).
seed = (0x41C64E6D * seed + 0x6073);
data = data ^ (seed >> 16);

General Structure
0x000 - 0x84B   encrypted data
0x84C - 0x84F   initial encryption seed
0x850 - 0x851   update counter
0x852 - 0x853   checksum from 0x000 - 0x84F (CRC16-CCITT)

Decrypted Data Structure (0x000 - 0x84B)
3 x 20 Pokemon in each area from 1 - 8.
3 x 10 Pokemon in 9th area.
20 Pokemon in the deepest area.
So they let you store a total of 530 Pokemon there!

0x000   deepest area
0x050   9th area center
0x078   9th area left
0x0A0   9th area right
0x0C8   1st area center
0x118   1st area left
0x168   1st area right
0x1B8   2nd area center
0x208   2nd area left
0x258   2nd area right
0x2A8   3rd area center
0x2F8   3rd area left
0x348   3rd area right
0x398   4th area center
0x3E8   4th area left
0x438   4th area right
0x488   5th area center
0x4D8   5th area left
0x528   5th area right
0x578   6th area center
0x5C8   6th area left
0x618   6th area right
0x668   7th area center
0x6B8   7th area left
0x708   7th area right
0x758   8th area center
0x7A8   8th area left
0x7F8   8th area right
0x848   unlock area 9 (0x01 to unlock)
0x849   unlock areas 3 - 8 (0x01 - 0x06) (area 1 & 2 and the deepest area are unlocked by default -> 0x00)
0x84A   0x00
0x84B   0x00


Pokemon Structure (4 bytes)
Bits
00-10   species
11-20   special move
21-22   gender (0 -> male, 1 -> female, 2 -> genderless)
23-27   form (see below)
28-31   animation (see below)

Form Bits
Unown
0 A
...
25 Z
26 !
27 ?

Deoxys
0 Normal
1 Attack
2 Defense
3 Speed

Burmy/Wormadam
0 Plant
1 Sand
2 Trash

Shellos/Gastrodon
0 West
1 East

Rotom
0 Normal
1 Heat
2 Wash
3 Frost
4 Fan
5 Mow

Giratina
0 Altered
1 Origin

Shaymin
0 Land
1 Sky

Basculin
0 Red
1 Blue

Deerling/Sawsbuck
0 Winter
1 Spring
2 Summer
3 Autumn

Meloetta
0 Aria
1 Pirouette


Animations
0	randomly turning around
2	randomly walking
4	randomly walking
6	walking up/down
8	walking left/right
10	walking left/right and randomly looking up/down
12	turning around clockwise
14	turning around counterclockwise
All odd numbers are invalid for animations and will make the Pokemon invisible.