Not sure about BGatomon, but legend has it Calumon can be gained after you get "Tamer
King"status. Get 13-15 Megas (I'm not sure if that's really required, try without them
anyway) and talk to the Calumon at your farm to get a Demon Lord quest, which'll net you
Beelzemon and Calumon scan data of 100%

-Harlequin Felis

how to get first finish the game get 35 megas then go to destroyed belt go to the end and
go back thenrun to lava river there will be a chip called all scan 100 chip