Kanto: Seafoam Islands, Viridian Forest, Pokémon Mansion, Team Rocket Hideout
Johto: Ruins of Alph+Union Cave, Ice Path, Whirl Islands, Mt. Silver (HGSS), Ilex Forest, Tin Tower, ||Olivine Lighthouse||
Hoenn: Meteor Falls, Abandoned Ship/Sea Mauville
Sinnoh: Mt. Coronet, The Underground, Iron Island, Stark Mountain, Distortion World, Eterna Forest
Unova: Chargestone Cave, Mistralton Cave, Reversal Mountain, Twist Mountain, Victory Road (BW), Clay Tunnel, Pinwheel Forest,
Kalos: ||Glittering Cave||, Frost Cavern, Winding Woods (Route 20), Victory Road.
Alola: Vast Poni Canyon, Mount Lanakila
>>54240660This is one of the weakest dungeons in the series to me. Finding out that it only has Rattata, Zubat and Grimer inside was a big letdown. I also find it annoying that you need to enter this place three times to explore it fully (mandatory first visit and two additional ones during different seasons).
>>54240698I really like this one. It is not too long, not too linear and has its own gimmick. It has some great Pokemon inside as well.