ice. get gyrados from lake of rage and teach it an ice move, get suicune and level it up till it gets aurora beam or in ice path get a jynx or swinub, but be warned, if you do that you will likely have to spend a lot of time leveling up to the necessary levels. personally i would recommend suicune as it also comes in handy for beating the elite 4
Lorelei has Ice and Water type pokemon, the best way to defeat her pokemon is to use Electric type pokemon or pokemon that have Electric type moves. Bruno has Fighting type pokemon and two Rock/Ground types, the best way to defeat his pokemon is to use Psychic pokemon or pokemon that have Psychic type moves. Agatha has Ghost and Poison type pokemon, the best way to defeat her pokemon is to also use Psychic type pokemon or pokemon with Psychic type attacks.
My favourite team for crystal was; Typhlosion, Suicune, Raikou, Togetic, Lugia and Ho-Oh. Hope this helps!
victory road
That's easy, use psychic or ground pokemon. But psychic are the best.
It's kinda like the difference between yellow and red/blue: different Pokemon you can catch, slightly different animations, and some of the caves or towers are a little different.
cindiquill
in Pokemon crystal the best Pokemon to have are feraligator(evolved form of totodile), weepinbell, kadabra, ledian (i would advise you to this Pokemon ice punch and headbutt), and pidgeot. these are the Pokemon i beat the elite four with
yes swarpert is a greatest Pokemon to defeat elite four
with using a rock or ground type Pokemon, the best Pokemon you can use to defeat a electric type is rhyperior ok!?
That would be... Ho oh or lugia
Wailord
Psycic moves work best.
Any Pokemon with ice or electric moves
Lorelei has Ice and Water type pokemon, the best way to defeat her pokemon is to use Electric type pokemon or pokemon that have Electric type moves. Bruno has Fighting type pokemon and two Rock/Ground types, the best way to defeat his pokemon is to use Psychic pokemon or pokemon that have Psychic type moves. Agatha has Ghost and Poison type pokemon, the best way to defeat her pokemon is to also use Psychic type pokemon or pokemon with Psychic type attacks.
use a masterball.
Lugia because it knows water moves and ho oh dont and they are the ultimates of crystal.
I take it Rosemy is a Bayleef. You need to use a Rock/Ground type such as Geodude (avaliable in Union Cave) as access to Water Pokemon is limited without a Rod.