Well, title says it all.
Pretty normal plot, group of new trainer set out on a journey, but instead of receiving and catching pokemon, they'll catch a Digimon instead! (And instead of using pokeballs, they will use DigiBalls(sounds dirty xD))

Each region got a different starter, this is the following starters:
Kanto: Gomamon, Agumon, Gabumon
Johto: Gaomon, Palmon, Lunamon
Hoenn: Guilmon, Renamon, Terriermon
Sinnoh: Coronamon, Kotemon, Betamon
Unova: Labramon, Palmon, Leormon