Sinnoh Champion John
I made a list on the first page so its hard to say.
Hmm let me see if i can offer digivolution advice
1. Chaosdramon X (Most wanted)-I think you know-
2. Blackwargreymon-Dark digivolve something in the Augumon line-
3. Gallantmon-get a guilmon and just digivolve-
4. Puppetmon-get a mushroom mon and just digivolve-
5. EmperorGreymon-use a hybrid synthensize on a rookie to get aguinimon. then use the b spirit for Burning greymon. DNA with an aguinimon for aldamon. digivolve aldamon and you got it-
6. ZeedMillenniummon-Mutate a virus champion digimon to deltamon. digivolve up to kimeramon, DNA with MAchinedramon to milleniumon, digivolve to moon, DNA with a gigasmon to zeed-
7. Raidramon-egg of friendship with veemon-
8. Omnimon-Dna your blackwargreymon with saberleomon, or Metalgarurumon-
9. Machinedramon-I think you know this-
10. Imperialdramon Fighter Mode (Black)-Veemon digivolve to exveemon, DNA with stingmon to Imperialdramon Dragon mode. Mode change to fighter mode-
11. Flamedramon-veemon plus egg of courage-
12. Dianamon-tournament-
13. Duskmon-Any rookie plus spirit of darkness(specify result)
14. Beelzemon-Contests, or certain DNA's-
15. Alphamon -Data champion mutate to Dinohyumon, digivolve straight up to slashangemon, DNA witha grapleomon
I hope that helped a little. these are a few routes to those digimon there are more if you look closely.