You can thank the Pendulum Z2 V-Pets. Even Kiimon and Yaamon got added to the DRB with new artworks due to the Digimon X2 V-Pets.I am legitimately surprised that they remembered Ketomon and Hopmon.
Apparently he was stated to be Baby Dragon in an old art tamers book or somethingDespite how "underdeveloped" it looks, Hopmon is a full Baby Dragon-type instead of Lesser-type.
Obviously, HeavyLeomon is a Vaccine Machine-type.
It has Sonic Excavator and Barrage Sweeper as attacks in Rearise, but not Resting Burner. its profile in RA mentions RB, though.
I thought so too at first, but looking at them side-by-side it's clear they're different. Same basic poses, yes, but not traced.They just traced over and shaded the Tamers lineart.