Since it is PALETTE_POINTER, it is a pointer. It is not an address.
You need to write a pointer to refer to that address.
The palette is not usually expanded, but the size of the image changes, so it is not addressable.
It may be relocated.
Therefore, it is specified with a pointer that refers to an address that is immutable, not an address.
Moreover, it seems that this image does not use TSA.
The image patch is complicated, so it is not something to handwrite.
Please open the Menu Tool -> graphic tool.
There is a smart image extraction function that automatically recommends TSA pallet.
So first, please find the image you want.
When the image is found, please press the "Patch Maker" button in the lower right.
Then, the patch is generated fully automatically.
All that is left is copying and pacing.
It is very easy.
I examined, this image will be below.
And the automatically generated patches are as follows.