Cape Collision Y (Vertical) Offsets: 2 bytes for right and left, on ground and in air.
The first two sets are for when Mario is on the ground while spinning ($10,$00 - right; $10,$00 - left), and the second two are while he is in the air ($02,$00 - right; $02,$00 - left)
The first byte in each set determines the position per pixel, the second sets whether it is above him or below him ($FF is below his feet, $00 is from his feet up) Use $FF-$80 for the below byte ($FF), and $00-$79 for the above byte ($00)