User blog comment:MarthBoy606/Upcoming Battle Hints (MarthBoy Edition)/@comment-10155300-20160402145557/@comment-25968390-20160402155321

The way I remember, Koromon is Aguman's In-Training Level form, which is before Rookie (Agumon's Level) level. So based on this research, I'd probably still be right; Not sure about SkullGreymon though (It's Agumon's Alt. Ultimate Level besides MetalGreymon, but it was used once only, and it went rampant...)... I understand; Confusing as hell...