Animal Crossing New Horizons designs research

The standard pattern data is 680 bytes.
1st: 120 bytes has the pattern name, creator/town name, and id.

2nd: 45 bytes for the pallet. Three bytes per color, the last one is alpha. There are 15 colors.

3rd: Pattern data. 512 bytes for a standard pattern. A pro design should be 2 KB for four 512 byte image data. (32x32 image)

4th: Padding, three bytes for standard patterns.