Scientist Ichiroubei Hiiragi discovers the existence of Six Gates, an otherdimensional world full of monsters and powerful hidden treasures known as Mon Mon Items. Ichiroubei embarks with his daughter, Rokuna, and her classmate, Mondo. However, they're foiled at every turn by Count Collection and his assistants, who want the Mon Mon Items in order to conquer both worlds. Becoming the heroes known as Mon Colle Knights, Mondo and Rokuna join forces with the monsters, striking back against Count Collection while searching for the Mon Mon Items in the name of friendship between their worlds.
Tomo Saeki
Yui Horie
Shigeru Chiba
Yuko Mizutani
Kazuhiko Inoue
Yuka Imai
Maria Yamamoto
Yumi Kakazu
Mika Kanai
Yumiko Kobayashi
Shin-ichiro Miki
Takehito Koyasu
Asako Dodo
Yuji Ueda
Kyoko Hikami