Art box
The art box is a development tool used to create and edit graphic data for Neo·Geo games. Its first and only (known) public demonstration is in SNK's 1992 Corporate Presentation.
The data created was then saved on a JEIDA IC card "SNK 16 MB FLASH MEMORY". It could then have been used as C ROM in CHAMC2 and other compatible boards.
It is not yet public knowledge if the IC Card retains palette data and/or index data for easy sprite data editing.