Carbuncle Pi is a puzzle game developed and originally published by Compile for the MSX2 computers in April 1991. It was available as part of the Disk 1 on Disc Station #24 disk-mag. The game features Carbuncle and Arle Nadja from the Madou Monogatari series. Carbuncle needs to collect all red gems (rubies) and deliver them for Arle through multiple mazes.