Divemin's Kamiwaza ability is to swim underwater. As a Bugmin, he can pull various objects into an underwater-like diamension through watery areas.
In the series
Divemin first appeared as a Bugmin in episode 23 when he kidnaps Masato and Mighty by pulling them, well as some various objects, into an underwater-like diamension through a large puddle. Yuto and his friends later came across Bug-Divemin and chases him down to a warehouse. Recordmin distracts Bug-Divemin by playing Masato's voice. Yuto finally captures and debugs Bug-Divemin, setting Masato and Mighty free for Mutemin as a result.
Divemin appeared as his Promin-self in episode 24. He distracted Boatmin, preventing him getting to Bug-Shugamin.