View source for Item data structure (Generation III)

'''Item data''' is stored in a 44-byte structure in the US version of the [[Game Boy Advance|GBA]] [[Pokémon games|games]].

<!-- In the Japanese version, the name field is only 10 bytes long, so the structure is 40 bytes long. -->

{| {{bluetable|float: right;}}
|- style="background: #ccf;"
! Offset
! Field
! Size
|-
! 0
| Name
| 14 bytes
|-
! 14
| [[List of items by index number (GBA)|Index number]]
| 2 bytes
|-
! 16
| Price
| 2 bytes
|-
! 18
| Special value 1
| 1 byte
|-
! 19
| Special value 2
| 1 byte
|-
! 20
| Description pointer
| 4 bytes
|-
! 24
| Mystery value
| 2 bytes
|-
! 26
| Pocket
| 1 byte
|-
! 27
| Type
| 1 byte
|-
! 28
| Pointer to field usage code
| 4 bytes
|-
! 32
| Battle usage
| 4 bytes
|-
! 36
| Pointer to battle usage code
| 4 bytes
|-
! 40
| Parameter for battle usage code
| 4 bytes
|}

==Pocket==
This determines which pocket of the [[bag]] the item should be stored in.

{| {{bluetable}}
|- style="background: #ccf;"
! Number
! Item type
|-
! 1
| Main pocket
|-
! 2
| [[Poké Ball]]
|-
! 3
| [[Berries]]
|-
! 4
| [[TM]]s and [[HM]]s
|-
! 5
| Key items
|}

==Type==
For items other than [[Poké Balls]], the type determines how the item can be used. With Poké Balls, the type indicates the Poké Ball type, and is one less than the index number.

{| {{bluetable}}
|- style="background: #ccf;"
! Type
! Description
|-
! 0
| [[Mail]]
|-
! 1
| Items which can be used out-of-battle.
|-
! 2
| Items which must be used in a certain location; key items of this type can be assigned to <sc>select</sc>.
|-
! 3
| Only the [[Pokéblock]] case is of this type.
|-
! 4
| Items which cannot be used out-of-battle.
|}

==Mystery values==
Mystery value 1 is:
* 0 for normal items.
* 1 for HMs and ''most'' key items.
* 2 for some plot-related key items: Devon Goods, Letter, Red Orb, Blue Orb and Oak's Parcel.

Mystery value 2 is:
* 0 for most items.
* 1 for many key items: Mach Bike, Itemfinder, Old Rod, Good Rod, Super Rod, Acro Bike, Pokéblock Case, Bicycle, Town Map, VS Seeker, Fame Checker, TM Case, Berry Pouch, Teachy TV, Tri-Pass, Rainbow Pass, Tea, Mysticticket, Auroraticket, Powder Jar, Ruby, Sapphire, Magma Emblem and Old Sea Map.

==Battle usage==
Battle usage can be:
* 0 if the item can't be used in battle at all.
* 1 if the item's effect is seen ''during'' battle but ''on'' a subscreen, such as healing items.
* 2 if the item's effect is seen in battle such as Poké Balls.

[[Category:Structures]]