That phrase is thrown around a bit here, and I honestly wanted to get to the bottom of it.
What does an average pokemon look like? What does an average digimon look like? The chart I made illustrates that.

With that being said, the most digimon like pokemon are unorincially,

>Nidos in original sugimori watercolor
>blastoise original sugimori watercolor
>slowbro
>kanghaskhan
>rhyhorn and rhydon
>crocnaw and Feraligatr

What are the most pokemon like digimon
>terriormon/lopmon
>kogamon from the manga
>zero from the manga
>gabu from the manga
>patamon sometimes
>cutemon
>dondokomon
>spadamon

Idk man, the shit is more similiar than you think because they are drawing from the same source.