which company is the developer of "cave story"?
Nicalis and Amaya
Cave Story
Independent developer Nicalis worked with Amaya to port the game to WiiWare and DSiWare in 2010. 
wiki:5838877
Cave Story [SEP] Introduction
Independent developer Nicalis worked with Amaya to port the game to WiiWare and DSiWare in 2010. An enhanced version, Cave Story+, was released for Steam in November 2011, and the original game was released for the Nintendo 3DS in October 2012 with added content. A 3D remake of the game, titled Cave Story 3D, was developed by Nicalis and published by NIS America for the Nintendo 3DS in November 2011. A port of "Cave Story+" for the Nintendo Switch was released in June 2017. The fast-paced gameplay of "Cave Story" revolves around Quote, a robot who wakes up suffering amnesia and who must explore and blast his way through cavernous areas in order to figure out his backstory and escape from the cave.