No, you cannot. I think that Digimon have to be at the same level (Champion, Ultimate, etc) to DNA Digivolve. However, if you have a DNA Digivolved digimon, get one of the digimon you digivolved it with (Like for Silphymon, Aquilamon or Gatomon) and if you DNA Digivolve, it should result in their rookie forms.
veemon
reptiledramon cant digivolve. it does not digivolve
Yes, Tankmon can digivolve to Gigadramon as part of Digimon Story Lost Evolution but it cannot then digivolve to Gundramon and it needs to be BlackAgumon before it can digivolve to Gigadramon, in Digimon Adventure 02: Tag Tamers it can digivolve to Kokuwamon and in the Digimon World 2 game Tankmon is capable of digivolving to Candlemon and thhen it can digivolve into either Tinmon or SkullMeramon, in Digimon World Dawn and Digimon World Dusk Tankmon ca digivolve to ToyAgumon and then it can advance further to MetalMamemon.
you digivolve a digimon
In Digimon World Dawn.... you need maximum friendship and level 40
Takato's partner is Guilmon and he can digivolve to Growlmon and then to WarGrowlmonn and Gallantmon, Henry's partner is Terriermon and he can digiviolve to Gargomon and then to Rapidmon and MegaGargomon, Rena's partner is Renamon and she can digivolve to Kyubimon and then to Taomon and Sakuyamon, Ryo's partner is Cyberdramon and he can digivolve to Justimon, Kazu's partner is Guardromon who can digivolve to Andromon, Kenta's partner is MarineAngemon, Jeri's partner is Leomon and Suzie's partner is Lopmon and she can digivolve to Antylamon.
You evolve gummymon
menu ... digimon ... digivolusion route ... X ... digivolve
It matters about the digimon, if you pass time it might digivolve to another digimon while some of them digivolve to another digimon if you have like 3 or more battles to make it digivolve. for an example: Greymon will digivolve to MetalGreymon with at least 10 battles, or he'll digivolve to MetalGreymon(Virus) if he has 30 Vaccine AP or he'll digivolve to SkullGreymon if you pass time. understand?
Calumon does not digivolve, he actually makes other digimon digivolve, but he does not.
veemon
reptiledramon cant digivolve. it does not digivolve
you have to be a certain tamer rank when you are that rank congratulations you can digivolve into mega
First, you have to have the right digimon, and the digiegg corresponding to the one you want. Then, after certain conditions are met, (they are all different) go to DigiLab PC and select Special Digivolve. Select Armor Digivolve and the Digimon you want, and Voila!
Yes, Tankmon can digivolve to Gigadramon as part of Digimon Story Lost Evolution but it cannot then digivolve to Gundramon and it needs to be BlackAgumon before it can digivolve to Gigadramon, in Digimon Adventure 02: Tag Tamers it can digivolve to Kokuwamon and in the Digimon World 2 game Tankmon is capable of digivolving to Candlemon and thhen it can digivolve into either Tinmon or SkullMeramon, in Digimon World Dawn and Digimon World Dusk Tankmon ca digivolve to ToyAgumon and then it can advance further to MetalMamemon.
you digivolve a digimon
At the moment (as of December 10, 2015) the ultimate level form of Digitamamon cannot digivolve or mega digivolve to any mega-level Digimon called HolyDigitamamon the only mega-level Digimon that Digitamamon can digivolve into are Titamon which is known as a "One-Man Digimon" and has the Virus attribute and Digitamamon can also digivolve to Devitamon which is a Mega-level Digimon, has the Mutant type and has the Data attribute.