Garla

Garla (ガルラ, Garura) was a short lived Manga by Go Nagai that was abruptly ended serialization due to a dispute between Toei Animation and Nagai.

Relationship with Mazinger
Garla features a mecha by the name of Big Daitan, the upper half of which resembles Grendizer. The only other appearance Big Daitan made was in Mazinger Angels, where it was defeated by Dragonsaurus