They possess very little offensive capability and generally rely on the care of other Digimon or humans to survive. Most of them attack using bubbles or some other mildly offensive technique, such as hurling themselves at an enemy.
They evolve quickly to Baby II. A number of Baby I Digimon have only a single Baby II stage to evolve into, but others can evolve into multiple Baby II forms, and yet others can evolve directly to their Child or Adult forms. Some Digimon skip this stage entirely and will hatch into the Baby II or even Child stage from the DigiTama. Baby I Digimon don't appear in the TCG cards, aside from minor illustrations on Option Cards.
|DigiTama ⇒ Baby I ⇒ Baby II ⇒ Child ⇒ Adult ⇒ Perfect ⇒ Ultimate|