Song of Sakuyamon Dejimon Teimâzu : Season 1 Episode 39

Sakuyamon was formed when Rika bio-merged with Renamon while they took a leap of faith to save Calumon from the D-Reaper. Rika fell back into Renamon and there was a blinding flash of blue light. The two Bio-Merge into Sakuyamon and drive back the chaos, rescuing Calumon, but the D-Reaper quickly recovers.