Battle BG Tile Formation

Offset $E71928
Length 2048 bytes
$00 Tile Index
$01 First bit of tileset ID (0 to 2)
$FE Tile ID (1-127)
$01 Misc byte
$01 Vertical Flip
$02 Horizontal Flip
$04 ?
$08 ?
$30 Palette ID (0 to 2)
$40 ?
$80 Second bit of tileset ID (0 to 2)