Ultraman Tiga (1996)

Trigger is the New Generation Tiga. This year marks the 25th anniversary of Ultraman Tiga. Manaka Kengo is a bit similar to the name Madoka Daigo. They both inherited the light and bonded with the giant. They both changed figures from Multi, Sky and power types.

The older brother of the Minato brothers, Minato Katsumi was quite similar to Madoka Daigo who is the protagonist in Ultraman Tiga. And if you love R/B's plot and characters, you'll definitely love Tiga as R/B did draw a lot of reference to the series. You might as well call R/B as a series homage to Ultraman Tiga.