>>723014643
>transitional era
>classic features such as the day/night cycle, days of the week, and game corner are removed
gen 1 didn't have time features, to call it a "classic" feature, it'd have to be a mainstay of the games from the get-go. Gen II had it yes, but in Gen III they dropped it because they were introducing the new weather mechanics and didn't want to overwhelm the players (who are primarily supposed to be children, this is a children's game series after all) with too many features. Gen III still had some time features, such as berries (both planted berries growing and NPCs that hand out daily free berries), the tides in shoal cave, the daily lottery, the daily TV events, and the daily check for if that dumb island appears or not. also eevee could still evolve into umbreon or espeon (you did have to trade it over from FR/LG to RSE which was dumb but whatever) you just didn't have a visual cue to know if it was day or night and had to check the clock set in your home town to make sure it didn't evolve the wrong way.

Gen IV immediately brought back the day/night cycle and days of the week, and capitalized on it even more with more weekly events, more time-gated activity like honey trees, more pokemon that can only be caught at certain times, and more time-based evolutions. as for the game corner this is a complete lie, the game corner was still present in gen III and IV, they removed it starting in gen V.

>eevee, golbat, and chansey are denied evolutions in FR/LG until the postgame
that was a dumb decision on their part, but a minor nitpick

>entire areas of the game are gated off unless you get a key item as part of japan-only events
by "entire areas of the game" you mean some tiny remote islands that are only there to capture a legendary/mythic pokemon. you're not missing out on anything other than getting that pokemon. and this is a moot case nowadays cause you can just edit in the event triggers and items on an emulator.