A recurring item in the Disgaea series is an item called the Accelerator. Purportedly equipped to a character's teeth, this item increases a character's movement range. This is a reference to the famed anime and manga Cyborg 009; the titular ninth cyborg could reach extremely high speeds by pressing a button hidden in one of his teeth.

The cyborg Kurtis is also a reference to Cyborg 009. He bears a strong resemblance to 002 Jet Link, and they both have rockets in their feet. In Disgaea 2, the first of his optional stages rewards the player with an Accelerator, and in Disgaea 3, his second Magichange skill is called Accelerate.