Easy HP Fever
At the start of a game, pick Armadillomon as a companion. When you get the Digi-Egg of Knowledge and have the HP Boost 100 Digi-Part, heal Digmon for 200 HP. You will then get HP Fever 1110.
Select Veemon as a partner if you are a beginner. He has three Digi-Eggs, compared to Hawkmon's and Armadillomon's two Eggs.
The strongest card is Omegamon. The back of Omegamon have two large cannon.
Most powerful card
The most powerful card is Level Mega.