Yeah, kind of like Megaman's synchro thing. The character unleash this power called a Digisoul, which is basically their emotions/hot bloodness and pass it through their Digivices which makes their Digimon digivolve. And yeah, it is kind of out there with Marcus punching these huge behemoths. He's punched out SaberLeomon if you can believe that and he only faces stronger enemies from there.
Also no Megidramon in this series, but Gallantmon shows up.