Walrein sorta looks like Ikkakumon? Birdramon looked a tiny bit like a weird moltres/fearow hybrid and then Togemon looks a little like Cacturne with some elements of Hitmonchan (the gloves hehe ) I only ever saw the first two seasons of digimon, so i'm afraid i don't really know anymore of them! I'm a pokemon fan at heart
Edit: What about megakabuterimon and heracross (cept the former was all skeletal and electric and that XD) just remembered that guy
The only Pokémon which has ever consciously struck me as resembling a Digimon is Hydreigon, which I immediately recognized as being extremely similar to Megadramon and Gigadramon ever since I first saw it.