"Pokelaad - The best a Pokemon can get ;)"
Lorelei is an ice-type Pokemon trainer, Ice-types are weak against Fighting-type and Fire-type Pokemon, but seeing as most of Lorelei's Pokemon are part water, using Fire-types is a bad idea except for against Jynx. But also because all of Lorelei's Pokemon, apart from Jynx, are part water then you can use Grass-type Pokemon as well. Lapras and Jynx are probably her strongest Pokemon. Her Pokemon are as follows:
Dewgong Lvl 54 (usually in this order)
Cloyster Lvl 53
Slowbro Lvl 54
Jynx Lvl 56
Lapras Lvl 56
So Dewgong is first and you want to get him out the way as quickly as possible, so use a strong Electric-type Pokemon such as Jolteon, Pikachu, Raichu or Zapdos. But I would be reluctant to use Zapdos as it is Flying-type as well, so it is extremely weak against Ice-types. But whichever you chose - teach them Thunder as it is an extremely powerful Electric-type move and also has 70% chance of hitting. Otherwise, just Thunderbolt will do.
Then you have Cloyster which can be taken out very easily one again with an Electric-type Pokemon.
Next is the tricky Slowbro, which is part Psychic-type and part Water-type. The only thing that really takes out a Psychic-type, is a Ghost-type. So unless you were planning on taking a Ghost-type anyway I wouldn't bother. So as it is part Water-type, and doesn't have the possibility to learn Ice-type moves then you can use an Electric-type or Grass-type Pokemon.
Now we get to the hardest part which is Jynx and Lapras. Jynx be taken out by a Fire-type Pokemon such as Charizard, Moltres or Rapidash. Your preference, but also Rapidash is solely a Fire-type so it only has 3 weaknesses in Water, Ground and Rock-types. Whereas Charizard and Moltres are also weak against Ice and Electric-types as well. Also Jynx can learn Ice Punch so just be sure to use a strong Fire-type move such as Fire Blast if you use Fire and Flying-type Pokemon.
We now get to Lapras which is a high level and seems to be invincible! Also it is Water and Ice-type, which aren't weak to the same things... So to beat it's Water-type side, you can use Grass or Electric-type. And to beat it's Ice-type side, you can use Fire, Rock or a Fighting-type. It's a bad idea to use a Fire-type or Rock-type Pokemon as well as its other part is Water.
The Pokemon I used to beat Lorelei first time was:
Pikachu Lvl 53 (to beat Dewgong, Cloyster, Slowbro and weaken Lapras)
Venasaur Lvl 49 (to finish off Lapras)
Charizard Lvl 48 (to beat Jynx)
My username is Pokelaad - hope I have helped.
two fire types one electric type and a water type and one you are confident in
electric for all except jynx for which you will need fire
there's no hope you cannot complete island1-7
you have to defeat team aqua in mossdeep city
Lorelei is part of the elite four actually the first member she gets in trouble with team rocket on four island and you need to rescue her.
The same place as the first. You just need to complete the Team Rocket Island 4-7 missions before Lorelei will return to the Elite 4, so you can rematch.
defeat team plasma at twist mountain
First, go to four island and go to the ice cave and complete the task. Once you get waterfall and defeat team rocket with Lorelei. Lorelei is back to the Kanto Elite 4.
Lorelei goes back to her home town - which is Four Island. However, she is not in her house; Lorelei is found in the depths of Ice Cave where she is fighting Team Rocket. If you help her defeat them, she will return home and later, back to the Pokemon League to rejoin the Elite Four.
She goes to her home on 4 island and then to the Ice Cave , then she Goes back to the Elite 4 In other words, Lorelei goes back to her home town - which is Four Island. However, she is not in her house; Lorelei is found in the depths of Ice Cave where she is fighting Team Rocket. If you help her defeat them, she will return home and later, back to the Pokemon League to rejoin the Elite Four.
look the best you can
Go to Four Island (get the Rainbow Pass from Celio) and Surf inside the Ice Cave (I forgot what it was called). Go through the puzzle and find TM07 (Waterfall) and Lorelei fighting Team Rocket. You help defeat one grunt and then they run away. Then go to the Pokemon League and she'll be there. SEE YA!
lugia, latios, and umbreon
After navigating around and finding HM WATERFALL, you head up the first waterfall. After that, you may have to go up another waterfall, but you might only have to go up ladders. You will find Lorelei "chatting" with Team Rocket. You must defeat Team Rocket, not Lorelei. She is your "temporary friend" until she leaves again to Indigo Plateau
well you have to defeat the Pokemon and sometimes the Pokemon will ask you if it can join your team............................................................................................:):)
Get the Goundon
Lorelei is in the Ice Cave on Island Four, up the waterfall battling Team Rockets. inside the cave is HM 07 Waterfall. teach it to a Pokemon and use it to go up the waterfall and there she is. Hope this helps. -Mewtwometwo
there's no hope you cannot complete island1-7
Team Rocket's Warehouse