>>29378734Unique from a battling perspective, not from a "region role filling" perspective
I'm not a fan of having the route 1 bird/rodent/bug or the cave bat every gen, but at least most gen 6 pokemon had some unique niche, and it seems like they've been trying to work on creating unique niches since gen 4. Diggersby has huge power and the unique ground normal typing, talonflame is bravest bird, and vivillon is pretty much the "basic" quiver dancer perfected.
You compare that to Sentret which is JUST a normal type, or swellow which is JUST a flying type, or Beautifly, which is JUST butterfree 2.0 (but worse)