This patch will allow you to spawn a kicked shell by placing one of the 4 Koopa sprites (sprite number 4 through 7) with extra bit set to 1 (the color depends on the Koopa used). Instead, placing a Parakoopa (sprite 8 or 9) with extra bit set to 1 will spawn a kicked "special green shell" (sprite DF).
Note that you have to run a sprite tool (e.g. pixi) on your rom at least once in order for the extra bit to be properly handled.
You can use both together, they don't conflict with each other. Although if you're also using the Sprite properties depending on the extra bit patch, you'll have to turn off the behavior for sprite 9 (since the kicked shell patch will override the other one).