For best or worst? I believe it is worst boss fight.Candice in Platinum. Snow Cloak + Double Team + perma-hail.
I’ll nominate the whole Hoenn Elite Four minus Steven in original Ruby and Sapphire, and then Wallace in Emerald for Worst Boss Fight. The Omega Ruby and Alpha Sapphire will not be considered due to improvement of movesets.
I’ll thread out each of them individually and why are they are either bad or unfun. They each rely on the “rare type” which already limits the option they have. It mostly focuses on Ruby and Sapphire for the Elite Four, as I believe this is their rock bottom ranking.
- Sidney: Dual-type overlap with Cacturne and Shiftry, the latter not even having any STAB attacks and deploy Double Team + Swagger, which is frustrating to deal with. Mightyena may be annoying with Sand Attack, but this can be countered by switching away. His Ace, Absol, does not even have any Dark-type STAB, having only Aerial Ace (which deters Fighting to be fair, alongside Shiftry’s Extrasensory) and Slash.
- Phoebe: First mistake is having two Dusclops and two Banette, as well as a rather weak Sableye. The species overlaps does have been lessened by much more effective movepool, but that also means common weaknesses for all but Sableye, which means if you have Dark coverage or plain brute force, she’s toast.
- Glacia: Not only she repeated the same mistake as Phoebe, but her movepools aren’t even that diverse, and offer no coverage beyond vs Fire and Rock through the Sealeo line. Her focus on Hail is nice and all, but that can be negated as Sealeo are too weak to keep up with your own party. One of her Glalie have Explosion in Emerald,
- Drake: Definitely the most impressive of the four by a large margin, with the only dud is having two Flygon and a weaker Shelgon, but that’s not the biggest problem. In RS, all of his Pokémon are weak to Ice, doubly so for Altaria, his two Flygon and his Salamence. Having Flamethrower on his Salamence and one of his Flygon, and Shelgon carrying Rock Tomb, may deter Ice-type, but it’s no use if it is incoming Ice-type attacks are from Water-type, especially Whiscash and Swampert. Emerald replaces one of his Flygon with Kingdra, and Kingdra managed to stay in ORAS. A tough cookie in comparison of the other three, but still easily taken down if you have an Ice-type move ready, or have freshly caught Rayquaza in Emerald.
- Wallace (Emerald only): Steven did have a few overlaps of Rock and Steel, but the Pokémon have enough diverse typing that one Pokémon isn’t an answer to all… except Water, but it could have ended worse. Wallace? Almost all of them are weak to either Electric or Grass, with Ludicolo being weak to neither. Even with Earthquake and Ice-type coverage, the player is already prepared to deal with all of the Water-type in Hoenn before, and Wallace may ends up not being so much of an exception. In short, if the player can easily defeat Juan, Wallace will be barely harder.