It basically works just like any other exanimation, just a few things are different:
AN2: The AN2 slot in the GFX bypass should be a 2bpp graphics file.
Type: The type of your animation should be "Type: 1 8x8 2bpp"
Destination: To get your destination you want to first open layer 3 of your level from the overworld editor and click the tile selector (
)
Then hover over the tile you want to exanimate and LM should display the tile number at the bottom (Somthing like "Tile 0x22" for example)
You want your destination to be 1B00 plus that tile number (so for my example you'd do 1B00 + 22 = 1B22)
The rest is basically the same, set how many frames your animation has, what the trigger should be, and of course the frames themselves*.
*Note that as far as I understand LM still considers tiles to be 4bpp meaning that you can only really use every other 2bpp tile.
For example, setting a frame to 691 (Which in 4bpp refers to tile 0x11 of your AN2 graphic file) actually refers to tile 0x44 in you AN2 graphics file since the graphics are only half as big.