Sunmon

Sunmon is the In-Training form of Coronamon. Sunmon's name and design are derived from the sun.

Digimon World Dawn and Dusk
Sunmon appears in Task Canyon but only in Dawn. It digivolves into Coronamon at Lv11 with friendship 50%. To degenerate into Sunmon, Coronamon must be at Lv1, but will only degenerate if you've befriended Sunmon.

Digimon World Championship
Sunmon can digivolve into Guilmon if it has 20 Dragon AP points or Salamon if it has 20 Holy AP points,or you can wait for passing time to Coronamon.

Digimon Story: Lost Evolution
Chibomon can digivolve into Coronamon or Kudamon, and be found in the Class Desert.