How do you combine Digimon DNA?

To combine digimon dna just have 2 champions then tag when tagging if there is a orange ball click the digimon then check wich of it's digivolutions can dna digivolve (it says dna digivolve) then click it.
Note:it won't stay dna digivolved tough

How to get:
Veemon: have to have beaten que long leader in amaretsu server) then go to where you found seiryu leader of asuka server in asuka server there's a dri agent paildramon is in bulk swamp note: that when you talk to the dri agent you only have 1 digimon of lvl 20 or lower with you.

Agumon:dri agent is located somewhere onthe mountain where mastertyrannomon is metalgreymon is in bulk swamp

Guilmon have a rookie of lvl 15 or higher dri agent is in seiryu city asuka server wargrowlmon is in ether jungle near the shrine

Kumamon:dri agent mobius desert ddna digimon forgotten

Monmon: ???

Kotemon: mobius desert and yes kumamon is also in the mobius desert kyukimon asuka ug lake

Patamon: dri agent central park magnaangemon forgotten

Renamon???

Hope it helps.

It depend I'm playing digimon world 3 and for dna digivolution(for me I call it digicross hehe) you must digivolve your rookie digimon like kotemon to dinohumon and renamon to kyubimon to combine into agunimon you must select tag to either dinohumon or kyubimon and it shows below dna dv select that and it will only do one attack and you switch to the second digimon you choose