Wondering how to beat the stadium leaders in Pokemon Emerald, Ruby, or Sapphire? This article will guide you through each stadium and provide you with step-by-step instructions on how to defeat the leaders of those stadiums.
Steps
Method 1 of 2: Finding the Perfect Team

Step 1. Upgrade your Pokémon to increase their characteristics
Towards the end of the game, most of your Pokémon should be around level 50. Check out the levels below for each stadium leader and prepare accordingly. To secure your victory, your group of 6 Pokémon must be at or above the level of the stadium leaders.

Step 2. Diversify your group
Assemble a team of double types of Pokémon. Dual-type Pokémon are counted as two elemental types at once. For example, Magneton is not one type of Pokemon like Pikachu, which is only electric, but two: electric and steel. Dual Type Pokémon can learn different types of attacks. The more dual-type Pokémon you have, the more different attacks you can use.
Don't forget to cover the rear. If you want to know which Pokémon are effective / weak against other types, this detailed table is for you

Step 3. Get a Pokémon with an attack that is extremely effective against the main Pokémon of one or another stadium leader
For example, against Roxanne, the leader of a stone type stadium, you should use water or grass type attacks.

Step 4. Familiarize yourself with BATT (Bonus to Attack of the Same Type)
Make sure that the attack you want is used by a Pokémon of the same type as the attack itself. This will make it 25% more efficient. For example, a water-type attack from a water-type Pokémon will be much more effective against a rock Pokémon than from a grass Pokémon (if he can learn it at all).

Step 5. Don't forget about objects
Throughout the game, you will collect various items, some from scripted scenes, others from picking up lost Poké Balls. Some items can be given to a Pokemon to increase its characteristics or help in battle. Let every Pokémon in your group hold a useful item in their hands.
Buy a couple of healing potions and resurrection items in Pokémart. Use regular, super, hyper, or super potions depending on how much money you have and what the maximum health of your Pokémon is. These useful items will help you gain an added advantage during combat
Method 2 of 2: Defeating the leaders of all stadiums

Step 1. With 3-4 Pokémon, you can easily defeat the leader of the stone type stadium
The first stadium is the easiest, so to defeat Roxanne, you must have a couple of level 15 or higher Pokémon. If you started with a Fire-type Pokémon, you may need to level up the rest of your Pokémon harder.
- Stone Pokémon are weak in front of Grass, Water, Earth, Steel, and Combat Pokémon.
- Stone Pokémon are effective against Flying, Insect, Fire, and Ice Pokémon, so don't use these Pokémon in combat if you can.

Step 2. Use your starter Pokémon to smash the combat type stadium
Pump 3-4 Pokémon somewhere up to level 20.
- Battle-type Pokémon are weak against flying and psychic Pokémon.
- They are strong against Dark, Ice, Steel, Stone, and Normal Pokémon.

Step 3. Take care of "grounding" to defeat the electric type stadium
Upgrade your Pokémon enough to cope with the 23rd Wattson Magneton. You also shouldn't rely on flying or water-type Pokémon to get knocked out quickly enough.
- Electric Pokémon are weak against Earth Pokémon (Earth Pokémon are immune to electrical attacks).
- They are strong against flying and water type Pokémon.

Step 4. Catch a strong water-type Pokemon to defeat the fire stadium
Any attack of water, earth, or rock type will have an increased effectiveness. Fire Pokémon have various weaknesses that can be easily exploited by ordinary Pokémon, but it is still better to expose the Water Pokémon. Your Pokémon should be able to defeat Level 26-28 Pokémon.
- Fire Pokémon are weak against Water, Earth, and Rock Pokémon.
- They are strong against insects, grass, ice, and steel Pokémon.

Step 5. To win in a regular type stadium, you can take any Pokémon
In battle, you can use attacks of any type, since all of them, with a few exceptions, do medium damage. Norman, the leader of the stadium, has three Pokémon, the strongest of which is only level 31.
Regular-type Pokémon are weak against combat Pokémon, but immune to ghost-type attacks

Step 6. Defeat Winona, the master of flying Pokémon, using a selection of Pokémon of various types
All enemy Pokémon are level 30, so make sure your party matches that level. With a balanced team, flying Pokémon won't give you any trouble.
- Flying Pokémon are weak against Electric, Rock, and Ice Pokémon.
- They are strong against combat-type Pokémon and insects, and are also immune to terrestrial types.

Step 7. Use a strong and balanced party to defeat the Psychic Pokémon team
Psychic Pokémon are some of the strongest Pokémon in the game, and they don't have many weaknesses. Despite this, a close-knit team of level 40-45 will win without difficulty.
- Psychic type Pokémon are weak in front of dark (immunity) type Pokémon, insects and ghosts.
- They are strong against fighting and poisonous Pokémon.

Step 8. Do not place fire, earth, and stone Pokémon in the last water stadium
At this point, you should already have a strong, well-balanced group that can defeat the leader of the water stadium. If you have a strong Electric Pokémon like Raichu, you don't need to think too much about the rest of the Pokémon in the group. You will be challenged by level 40-43 Pokémon.
- Water-type Pokémon are weak against Electric and Grass Pokémon.
- They are strong against Fire, Earth, and Stone Pokémon.
Advice
- Catch other Pokémon to hedge your starter, especially if it's the wrong type.
- Upgrade your starting Pokémon (the first Pokémon you received) so that it is at least 2 levels older than the stadium Pokémon. All spare Pokémon (which you catch during the game) must not lag behind the starting one by more than 2 levels.
- You can choose any starting Pokemon. Having strong Pokémon and pumping them enough, you can overcome all the stadiums.