- Classification: Kaijū
- Homeland: Below Earth
- Height: 40 m
- Weight: 20,000 t
- Trademark Technique: Becoming Popular with Kids
- First Appearance: Manga Chapter 6, Anime Episode 3
Franky (フランキー) is a Kaiju who kidnaps two of Mari's students. Kinnikuman tries to save them, but they prefer Franky and refuse to be saved. This comically results in Franky having to protect the children from an angry Kinnikuman. Before he can make his mother proud by becoming the first popular Kaijuu, Meat lures the children away with chocolate and defeats Franky. Speaks in Kansai dialect.