In the extracted Densetsu no Starfy 4 ROM, there are internal character and enemy names in the filenames of the related Cell Animation (NANR), Cell Resource (NCER), Cell Graphic (NCGR) and Color Resource (NCLR) files. These names are listed below.
- The filename of an unused file refers to Bonbone as 'Bonebone'.
- Blocky's internal name is "Blockka". This is very similar to the name of the enemy Blokka from Densetsu no Starfy and Densetsu no Starfy 2.
- There are duplicates of Takota's Zukan files named "Huuta". It's possible that it may be referring to an older name for Takota or an unused character or enemy.