Popful Mail: Magical Fantasy Adventure (ぽっぷるメイル, Poppuru Meiru) is a side-scrolling platform game. Popful Mail was developed by Nihon Falcom for the NEC PC-8801 computer in 1991 and for the PC-9801 in 1992. It was later ported to PC Engine CD-ROM by NEC Home Electronics and to the Sega CD by "Sega Falcom", an alliance of the two game companies Sega and Falcom. In 1994, Falcom themselves remade Popful Mail and released it on Super Famicom; this release was their first original console game. SIMS Co., Ltd. translated the Sega CD version and Working Designs published it in North America in late 1994.
Source: Wikipedia, "Popful Mail", available under the CC-BY-SA License.