This version of Akumajou Special - Boku Dracula-kun is a fan translation patch, bringing the Japanese-only title to English-speaking audiences. The "En by Vice v1.04" designation refers to the specific translation patch version, created by the group or individual known as "Vice". Fan translations are important for making otherwise inaccessible games available to a wider player base.  In this case, it allows English speakers to play and appreciate the humorous spin-off of the Castlevania franchise.

Akumajou Special - Boku Dracula-kun (Japan) [En by Vice v1.04] (~I'm Kid Dracula!!)

Akumajou Dracula (Japan) (Rev 2) (Disk Writer)