Shinkon Gattai Godannar!!
English name: Marriage of God & Soul Godannar!!
Genres: Comedy, Romance, Sci-Fi, Ecchi
Type: TV, Episodes: 13
Aired: Oct 1, 2003 to Dec 24, 2003
Studio: OLM, AIC ASTA
Source: Original
Rating: PG-13 - Teens 13 or older
Synopsis:
Five years ago, while battling an alien force known as the "Mimesis," Dannar pilot Goh Saruwatari first met Anna Aoi. Today, on the day of their wedding, the ceremony is interrupted when the Mimesis strike again. As Goh struggles in his battle against the alien threat, Anna stumbles upon a top secret robot known as the "Neo-Okusaer" and uses it as a last-resort to save her fiancee. At that moment, Dannar and Neo-Okusaer merge to become the mighty robot "Godannar."

(Source: ANN)