How sprites enter pipes with the player. This handles carried sprites and riding yoshi, and is always set regardless whether or not the player is carrying a sprite and whether or not is riding yoshi. When this RAM is set to any non-zero and the sprite is being carried and/or yoshi is being ridden on, they're placed behind layer 1 and yoshi's tongue is not shown (when licking).
$01 = Horizontal pipes (duck a little on yoshi and carrying sprites facing left or right).
$02 = Vertical pipes (face the screen).
$FF = Don't change image, only go behind layer (shooting out of slanted pipe). Note that this will probably work with all values #$03-#$FF.
Note: Yoshi always show his pipe animation pose regardless if the player is mounted on Yoshi or not, consider using this patch to fix it.
