05/16/08: X_Loto found some new info on bytes A2--A8. Rock on!
05/19/08: X_Loto discerned the use of bytes 02-03. Sexy!
05/20/08: By the gods, you mean Waylay actually made some progress?! Not really, no. ^-^

Values for bytes 00/01 can be found in Random.txt
00: Character  (Corresponds to battle byte E2, as determined by x_loto)
01: Map Sprite (Corresponds to battle byte E3, as determined by x_loto)
02--03: the location that the "last battle option used" data is stored for the next battle (direct quote from x_loto ^^)
04--05: HP (Corresponds to battle bytes 28--29; the routine, as I understand it, doesn't involve battle bytes 2C--2D; see in-battle status page for details. Credit: x_loto)
06: Current LP
07: Max LP
08: Current WP
09: Max WP
0A: Current JP
0B: Max JP
0C--0D: # of encounters
0E: STR
0F: QUI
10: INT
11: WIL
12: PSY
13: VIT
14: CHA
15: Gifts (x_loto: Copied to battle byte 16B)
16: Race modifier
17: ?? (Something to do with Half-Mystic? Asellus has 01 here, others have 00. *addendum*: Roufas has 05. What the hell.) (x_loto: This byte is copied to battle byte 16A)
18--27: equipped abilities (2 bytes each)
28--2F: equipped items (1 byte each)
30--37: x_loto: Corresponds to battle bytes 194--19B..still no clue what they do.
38--3F: Sword arts (bit toggle)
40--41: Gun arts (bit toggle)
42--47: Fighting arts (bit toggle)
48--57: ??
58--63: Magic
64--6D: Dodge/Mec arts (bit toggle)
6E--75: Mystic/Enemy skills (bit toggle)
76--77: ??
78: Monster form (takes effect if Monster bit is set in Gender)
79--7B: Monster/Mec BaseHP. Byte 79 may not influence this (999 HP can be set with 2 bytes.) Still, until I know what byte 79 is, it stays here. :)
7C: MysticSword absorbed monster (takes effect if Mystic bit is set in Gender? *untested*)
7D: MysticGlove absorbed monster "
7E: MysticBoots absorbed monster "
7F--87: ??
    78--87: Repeating myself again, but x_loto noted that this entire block is copied to battle bytes 132--141.
88--91: x_loto: 5 2-byte values corresponding to battle bytes 17C--185; all were 00 00 in his tests.
92--9D: ??
9E--9F: x_loto: Copied to battle bytes EC--ED
A0: ??
A1: x_loto: Copied to battle byte 3D
A2--A8: To do with modifications from equipment. (Thanks to X_Loto for this one!) (Note 5/20/08: This includes Mystic absorbs, as well.)
A9--FF: ??