Which Apple Pencil is compatible with iPad Pro 12.9-inch

Here is Apple’s definitive compatibility list for Apple Pencil and iPad:

Apple Pencil compatibility - Apple Support

As you will see, your second generation iPad Pro supports the first generation Apple Pencil:

https://store.apple.com/xc/product/MQLY3ZM/A

The first generation Apple Pencil is the one that is compatible with the 2nd Generation iPad Pro 12.9”.

That iPad will only work with the first generation Apple Pencil. Click here for more information.

(251302)