||Chases the player. Turns translucent when looked at, revealing a Blue Coin, or ocaisonly a Red Coin or Yellow Coin inside.
00 - None
10 - Mario
21 - Luigi
32 - Wario
00 - Normal
01 - Stays still, doesn't turn transparent, cannot be defeated or stomped but can be eaten which triggers the usual line "You can't eat ghosts" and can be pushed around by walking into it.
02 - Slightly erratic chasing movement, triggers "ghosts don't die" text, otherwise normal
03 - Spawns two of the Para1:1 ghosts in the same place
04 - Transparent, slightly bigger, flies away forever after being approached. Used in castle corridor.
05 - Slightly bigger, contains Big Boo's Haunt cage,
06 - Appears normal?
07 - Spawns three Boos, one of them may be Param. 1/2 behaviour.
08 - Doesn't chase or turn transparent, but moves in a circle, otherwise normal.
09 - Same as 0?
0A - Contains yellow coin instead of blue coin, may contain red coin in certain circumstances and doesn't appear at the beginning of the game.
0B - Doesn't spawn?