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Mecha Mecha Ninpou Hidenchou (メカメカ忍法秘伝帳 - Mecha Mecha Ninpou Secret Book) is shown in episodes before the final credits. It explains details of animaloids and Mechas appearing in the cartoon.
Mecha Mecha Ninpou Hidenchou Logo
Mecha Mecha Ninpou Hidenchou has 20 chapters:
| Mecha Mecha Ninpou Hidenchou chapter |
Episode number | Chapter is about | Picture |
| 1 | 1 | Yattaro |  |
| 2 | 2 | Pururun |  |
| 3 | 3 | Sukashii |   |
| 4 | 4 | Nyanki suit up and launch procedure |   |
| 5 | 5 | Omi-chan |   |
| 6 | 6 | Edoropolis castle |   |
| 7 | 7 | Karamaru |   |
| 8 | 8 | Nekki and Mietoru |     |
| 9 | 9 | Usako Tokugawa |   |
| 10 | 11 | Gotton and Rikinoshin |     |
| 11 | 12 | Kitsunezuka Ko'on-no-Kami |   |
| 12 | 13 | Yami no Yon Nin Shu |   |
| 13 | 14 | Toritsukkun Armors |
    |
| 14 | 15 | Nyago King |   |
| 15 | 16 | Karasu Gennarisai |   |
| 16 | 17 | Daisensei |   |
| 17 | 18 | Inuyama Wanko-no-Kami |   |
| 18 | 19 | Neko Me Slash attack |
    |
| 19 | 20 | Otasuke members launching |
        |
| 20 | 22 | Crows |   |
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