>>54692658Depends on the context. If we're looking solely at the original games, I'd say Sevii islands.
Battle Frontier is obviously a really nice addition, but its implementation in Emerald was obviously a first attempt. The actual area itself was super cool, but the facilities were a huge mixed bag. It ends up being EXTREMELY grindy, and something that you really need to invest a shit ton of time into. If you can get over that hurdle, and are tolerant to RNG, then its cool for like, challenge runs and shit, but I think that the actual amount of use that people got out of the Battle Frontier on average ended up being really low. I knew I grew disinterested in it as a kid. Still, even in an iffy state, it IS a major end game goal to work towards, which is ideal.
The Sevii Islands were a really cool addition to FRLG, they are peak comfy. The Johto music, the extra places to explore, cool little hidden details here and there, just a lot of fun for a little breakaway from the main story. Having Johto mons available back in FRLG was a big deal back then too. Seeing additions to previously established regions (like Sinjoh, and the Blueberry Academy) is really intriguing to me, I feel it helps flesh out the world greatly.
I also really like how it breaks up the pace of Gyms 7 and 8-- in RBY going from Blaine straight to Giovanni was pretty anticlimactic. Sevii gives a proper amount of time, while reinforcing Team Rocket's far reaching effects.
That being said, most of it is very one-and-done, there's not a lot of reason to go back to the places. And, I think the biggest let down is
>>54698506 .. Battle Hill just kinda sucks. I'm sure the intention was to not step on the Battle Frontier's toes or whatever and offer something different, but its just not a very good battle facility.
Still, replaying the games, I've gone through the Sevii Islands in full everytime I've played FRLG, whereas the Battle Frontier I hardly touch, so I have to give it to Sevii.
