struct	AttackType
u1	is_blue_magic
u1	is_white_magic
u1	is_black_magic
u1	is_dimension_magic
u1	is_summon
u1	is_sound
u1	is_longrange
u1	is_physical

struct	AttackProperties
u2	action_delay
u1	roulette
u1	target_enemy_by_default
u1	can_target_either_side
u1	can_select_target
u1	always_target_all
u1	can_target_all

struct	WeaponData
AttackProperties	attack_properties
AttackType	attack_type
u6	item_type
u1	is_unthrowable
u1	byte_2_leftover
EquipStatBonus	bonus
u6	description
u1	can_double_grip
u1	only_double_grip
u1	is_wonder_rod
u1	is_action_on_use
u1	can_magic_sword
u1	is_action_on_hit
u1	is_5.4
u1	is_initiative
u1	is_knife_parry
u1	is_sword_parry
u7	spell_cast
u1	is_break_after_use
u8	attack_power
u7	attack_effect
u1	byte_8_leftover
u8	param0	# accuracy_percent for sub-100 weapons, crit rate on katanas, element on Flametongue/Icebrand/Excalibur/AirKnife/Trident/WindSpear
u8	param1	# on_hit_effect_percent for weapons that cast actions on hit, also Rune weapons bonus attack power
u8	param2	# action_on_hit for weapons that cast actions on hit, Also Rune weapons 5 mana cost on attack, also element of attack for rods

struct	ArmorData
u8	slot	# b0 - 0x01 acc, 0x02 body, 0x04 head, 0x08 shield, 0xF0 unused
u8	weight	# b1
u6	item_type
u1	is_unthrowable
u1	byte_2_leftover
EquipStatBonus	bonus	# b3
u6	description	# b4
u2	byte_4_leftovers
u1	is_improve_catch	# b5
u1	is_become_undead
u1	is_improve_dance
u1	is_halve_mp_cost
u1	is_improve_steal
u1	is_improve_brawl
u1	is_elf_cape_dodge
u1	is_block_all_magic	# b5
u8	evasion	# b6
u8	defense
u8	m_evasion
u8	m_def	# b9
u8	elem_effect	# b10 - 01 ½ lightning, 02 ½ all, 03 immune poison damage, 04 absorb fire+immune ice+weak water, 05 absorb water+immune fire+weak lightning, 06 Bone Mail (absorb poison, halve ice, weak fire/holy), 07 absorb fire, 08 absorb ice
u8	status_effect	# b11 - 01 auto-regen, 02 auto-doom, 03 auto-haste + immune slow/stop/paralyse/sleep, 04 immune petrify, 05 Ribbon, 06 immune confuse, 07 immune silence, 08 immune blind, 09 immune poison, 0A bone mail, 0B auto-reflect, 0C immune mini, 0D immune old/zombie, 0E auto-sap + immune sleep, 0F auto-blink, 10 immune mini/paralyse, 11 immune confuse/mini, 12 immune confuse/toad, 13 immune toad/paralyse


struct	ItemData
AttackProperties	attack_properties
u8	attack_type
u1	unk0
u1	is_unmixable
u1	unk1
u1	is_magic_lamp
u1	is_undrinkable
u1	is_unusable_in_battle
u1	is_unthrowable
u1	unk2
u6	description	# b3
u2	byte_3_leftovers
u7	attack_formula
u1	is_unavoidable
u8	param_0
u8	param_1
u8	param_2


struct	MagicData
AttackProperties	attack_properties
u8	attack_type
u4	meteo_extra_hits
u2	unk
u1	is_learnable
u1	is_monster_bit
u7	mp_cost
u1	is_unreflectable
u7	attack_formula
u1	is_unavoidable
u8	param_0
u8	param_1
u8	param_2


struct	ElemDef
u8	absorb
u8	evade
u8	immune
u8	half
u8	weak

struct	StatusEffect
4 of u8	initial
3 of u8	immune


struct	EnemySpriteData
u7	tileset_offset_hi	# combined with lo, << 3, + 0x150000
u1	is_3bpp
u8	tileset_offset_lo
u2	palette_offset_hi	# combined with lo, << 4, + 0x0ED000
u4	unk
u1	is_separate_shadow
u1	is_large_layout
u8	palette_offset_lo
u8	layout_id	# Small? <<3, + 0x10D004, take 8 bytes. Large? <<5, + 0x10D334, take 32 bytes.

struct	BattleBackgroundData
u8	tileset_id
2 of u8	palette_ids
u8	tilemap_id
u8	tilemap_flips_id
u8	tilemap_v_flips_id	# Unused, all 0xFF = no flips
u8	tilecycle_id
u8	palcycle_id