Rokumon Tengai Mon Colle Knights

A scientist named Ichiroubei Hiiragi uncovers the Six Gates, an alternate dimension filled with monsters and valuable artifacts called Mon Mon Items. He travels with his daughter, Rokuna, and her friend Mondo. Their efforts are repeatedly hindered by Count Collection and his subordinates, who seek the Mon Mon Items to dominate both worlds. To counter them, Mondo and Rokuna become the Mon Colle Knights, teaming up with the creatures of the Six Gates to fight Count Collection and retrieve the items, aiming to strengthen the bond between the two worlds.