|Family and Relations||Unknown|
|First Appearance||Shin Mazinger ZERO VS Great General of Darkness|
Grosten resembled a gigatic slender gecko, he had green scales with an orange underbelly, hands and feet. Aroud his large egg shaped eyes was a scruffy black mane with his true face located in the middle.
Powers and AbilitiesEdit
Grosten could fire out eye beams, and had a eroding acid beam from the mouth.
- Grosten is based on his origonal concept art, similar to his Kaiser counterpart.