>>35974472In Gen II? Absolutely, without all the sidequests that were there in Gen I it's especially small, also Mt. Moon and Rock Tunnel were simplified, Silph is just one floor, Cerulean Cave and the Seafoam Island cave were removed and the ruins of Cinnabar Island don't help either. Oh yeah, and Viridian Forest got shafted too, but it's still very impressive that they managed to fit in what they could given how inept Game Freak are at coding (they needed Iwata to save them).
Gen IV did a very good job at restoring some of the size of Kanto, shame they didn't fully restore Mt. Moon but it's nice having Viridian Forest, Cerulean Cave etc. back