The Denpa Men 2 is the sequel to The Denpa Men: They Came By Wave.It has new enhanced features, new Denpa Men, and a slightly customised rule-set. Another new addition is that your hero Denpa Man now speaks, however the voice is quite high and squeaky, turning key suspense building parts of the story into more of a joke, a laugh, designed purely to distract you and make you trip up during boss fights. The Streetlamp is a new item that lets you explore the Cave of Darkness, when streetpassing with others extends the amount of time the Streetlamp can maintain its light.
This game occurs some time after The Denpa Men: They Came By Wave, starting in the protagonist and Crystal's new home with their 2 kids. An Ook trespasses their lawn, and the protagonist battles him, after his defeat, the enraged Ook call some of his friends and kidnaps Crystal and her kids. Now is up to the protagonist to recruit more Denpa Men in order to save them. After defeating King Ook, the protagonist frees his/her child. However, the protagonist soon discovers that a portal has opened to a room with 6 buttons, each representing a priest. The protagonist must fight the 6 priests to unlock the door of the Evil Witches Tower, which is perched on the tallest mountain in the Denpa Men planet. Along the way the protagonist finds out the world has changed landforms due to the Evil Witch and her bad intentions. Digitoll is now in ruins, the Gaurdian Tower has been destroyed, and the once frozen-over Polar cap from Denpa Men 3 has melted away revealing an underground cave of horror and danger.(This explains why the planet in Denpa Men 3 looks different from the planet in Denpa Men 2) The title features open world gameplay, which requires the user to locate stages before completing them. Shortly after the previously mentioned proceedings, the possibility of leaving Digitown is introduced. The first settlement visited subsequently to this is the Small Farm which is inhabited by some dwarves. The dwarf dwelling within the house tells something of the woe that has so befallen his homeland. The main storyline concludes upon the defeating of the Evil Witch, but an optional side quest exists that transforms the Marsh Fishing Spot into the Gate to Hades, allowing the Denpa Men to be transported to the Inferno. The purpose of this is to rescue the King of Evil of whom Crystal becomes somewhat fond. He is murdered by the Evil Witch in a cutscene in Palace Tower, but can be resurrected by defeating the Demon queen: the undead version of the Evil Witch.