Depending on their stats certain Digimon can DNA digivolve to become new ones. There used to be a list somewhere but I don't know where it went...
EDIT:
I use the list from http://forums.supercheats.com/topic.php?topic=74877 which gives a full list of DNA Digivolutions AND an Armor Digivolution list.
You can't DNA digivolve in this game.
reptiledramon cant digivolve. it does not digivolve
You DNA Digivolve Kongoumon with Yatagaramon.
garudamon+blossomon or yatagaramon+ karentenmon
Gazimon are not in Digimon World: Dusk or Dawn.
get pawnchessmon white and degenerate it into puttimon then digivolve it into salamon
menu ... digimon ... digivolusion route ... X ... digivolve
reptiledramon cant digivolve. it does not digivolve
garudamon+blossomon or yatagaramon+ karentenmon
You DNA Digivolve Kongoumon with Yatagaramon.
Gazimon are not in Digimon World: Dusk or Dawn.
You DNA digivolve it first then you'reable to get it by digivolving Phantomon.
get pawnchessmon white and degenerate it into puttimon then digivolve it into salamon
you have to DNA digivolve matordormon and mummymon at level 61
u need one to beable then go to digilab and click on armor 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.
In Digimon World Dawn.... you need maximum friendship and level 40
digivolve gatomon till you get one