How do I beat the gym leaders those twins of mossdeep city they are too..

All you need is a strong water type and a dark type like absol!! Psychic types don't stand a chance against dark types!!

Well you are going to have a hard time beating them with a fighting type. There Pokemon type is psychic. There biggest weakness is darkness. Three of their Pokemon are weak against water (Solrock, Lunatone, and Claydol.) If you are having a hard time attacking first get a Pokemon with good speed stats. Such as Ninjask. Try to use a water type and a dark type in the double battle.

Buddy do't use fighting types psychic is good on fighting. Catch a poochyena and grow it up to be a powerful mightyena, then get an absol and train it up aswell. Tate and Liza won't know what hit them.

Well, their weakness is not fighting for one, and their main weakness is water so attacking with water and grass moves should work. If you started with Mudkip and he is at least a Swampert. Using water for that battle if Xatu is starting to pwn your grass type.

They use Psychic types, which are a pain. Bring somebody with Ghost moves, or a Psychic of your own. Gardevoir is a great choice. You should put good moves on your pokemon. Make sure you also have a Water type to take out Solrock and Lunatone. An Electric type is good for Xatu.

Using carbos on your Pokemon would help?
I would have any electric Pokemon, such as a Raichu, that knows thunderbolt, and a water Pokemon, such as Gyrados, that knows surf.
Use Raichu for Xatu and Gyrados for Lunatone, Solrock, and Claydol.
Raichu and Gyrados are just examples, however, and you can use any electric and water Pokemon you like, as long as they would know thunderbolt (or any electric attack) and surf (or any water attack).
Again, use carbos on your water and electric pokemon! Have back-up electric and water Pokemon, too!

You will want to try ice, fire types on them.

You could try using Fire type moves or other moves that are greatest at knocking down hp.

dont use fighting use dark like mighteyana and use any water type it really doesnt matter which one. And they need to be in the high thirties or higher. A ground pokemon cant hurt because the solrock likes to use earthquake a lot

Well I have a water Pokemon and grass Pokemon level 40 but I can't attack them, they kill all my pokemon. What should I do?

I highly recommend using a absol at level 35 it will know bite. Gyrados is even better it can learn surf and other water attacks and can learn bite. Bite is a dark type move therefore being super effective against the duo. With these two Pokemon at level 35 I defeated the pair in 3 min.

Dark type moves are probably the Psychic types greatest weakness. Take a Dark Pokemon like Absol or Mightyena with you. A strong Water such as Gyrados type is also useful for Lunatone, Solrock, and Claydol. Maybe take a good strong Electric Pokemon with you too for Xatu since Electric is super good on Bird types.

The mossdeep city gym is the hardest gym by far. I got lucky and got Pokerus (search it) and leveled up super
Fast so battle lots of wild Pokemon and good luck

Simple,near lilycove,there are fine myghtina's .cath them.easy. But I acually wanted a cheat.

You should use really strong dark and water types. Also be sure to bring an electric for xatu. Hope you win.

My team just now ang want help to get it better

Blaziken lv45

Kadabra lv32

Raichu lv31

Gyarados lv33

Loudred lv29

Xatu lv30

Try to use a mightyena psychic does not effect it but be sure to bring a bunch of awakening cause the lunatone knows hypnosis o_0

Ive beaten them using (strategy) XD
Blaziken , mightyena and even brelloom.. . . And other extras .
I just used soda pops and revives hahaha. . That gym is a pain.

Dark types are your best bet. Also, a water or grass type will be super effective against 3 of the 4 pokemon. However, xatu will use sunny day and the other 3 know solarbeam which will be a one turn attack. Catch a fast electric type like manetric and knock out xatu before it uses sunny day. Good luck!

I have lv.53. Swellow
Lv,35..manetric
Lv,,34,,,absol,,
Lv..26,,,,mightyena
Lv,,32,,azumarill

Tell me the order to fight them?

I lvled up my mighteyna and absol both to 39 and had the blue flute which awakens Pokemon without having to buy a lot of awakening. It took nearly all of the pp for bite for both Pokemon and took forever but I won using only the 2. Good luck that gym is a pain.

You have to have maybe fire type or water type

If you get rare 🍬 cheat get all your Pokemon to level 💯

Fighting type Pokemon are weak to psychic type.... Must be why you are losing.

Some of their Pokemon have rock sub types so you can exploit that by using water Pokemon.

Generally, Psychic type Pokemon are weak to dark, ghost and bug type Pokemon so if you want an easier time defeating them, use these 3 types of Pokemon.

Well, ikr this is a veeery late reply, and by now you've already beaten everything, but.

Have an electric Pokemon, such as Manectric. You can get his pre evolution, Electrike, in many places, such as in the south of Mauville. I recommend leveling from 43-45. 43 because he'll have tons of dmg on it's spark against Xatu, but if you wanna be safer, lvl it up until 45 to learn Thunder and simply own Xatu as long as it doesn't miss.
IMO at least, you REALLY need an Electric type to beat Xatu, then for the other three you should have a Pelliper, Gyarados, etc so that you can use Surf. In fact, Pelipper and Gyarados must be the most optimizing choice since they're not affected by Earthquake. Well... That's about it.

PS: If you wanna be extra safer you can also have a well leveled up Mightyena or Absol (37-43), in case anything goes wrong

I recommend sharpedo or crawdaunt, they are both water and dark, super effective agaisnt all of the types there, sharpedo can be found with super rod in pacifidlog cit and the pre evolved form of crawdaunt can be found at the pond in petalburg, if you don't want that go to the shoal cave, there is a pre evolved form of glalie there that you can catch that can learn crunch (shoal cave is north of mossdeep city, and also make sure that it's low tide) after the snowrunt is caught level it up to 28 and make it learn crunch after that level it up to glalie.

I used a sableye against them...since it's a dark type it will be effective, moreover use a strong water type like swampert. But if your starter wasn't mudkip, you can still use a lombre or other water types against them!
I suggest you use a water and a dark type when battling the twins

Use pokemons like absol mightyena and sableye, absol and sableye can learn shadow ball and almost 1 hit ko the mossdeep gym leader, and mightyena can learn bite and if you give him the sunglasses the bite going to take half of xatu hp or 1 third of claydoll hp

I recommend using gyarados it dosent take any damage from claydol