Yep, Ardhamon is the only form missing. Unless you count Susanoomon.
I always thought of Susanoo as more of a DNA final fusion route then an actual digivolve route, like Omnimon or Paladin Imperialdramon. Those forms technically can't be access without somesort of DNA fusion of various other digimons or some special thing.
Although, i guess Kaisergrey would be like that since Takuya did need a bunch of spirit types.
On a funnyside note; Ardhamon, Kaisergreymon and Ancientgreymons are all ultimate routes, which is kinda funny.
I always thought of Susanoo as more of a DNA final fusion route then an actual digivolve route, like Omnimon or Paladin Imperialdramon. Those forms technically can't be access without somesort of DNA fusion of various other digimons or some special thing.
Although, i guess Kaisergrey would be like that since Takuya did need a bunch of spirit types.
On a funnyside note; Ardhamon, Kaisergreymon and Ancientgreymons are all ultimate routes, which is kinda funny.
Ardhamon and Kaiser Greymon are Hybrid forms though.