In battle, switching is one of the more important aspects. If you're faced against a Pokémon which will likely defeat your Pokémon, a retreat is the best strategy. However, there are many moves, abilities and items which can both aid or hinder the ability to escape.

Switching in Trainer Battles

Switching in battles is a very simple thing to do. In it, you can switch the Pokémon with any Pokémon within your team. in Single & Double Battles, this is done easily but in Triple Battles, there is the factor of positioning that needs to be taken into consideration. Switching will take the turn completely and occur before all moves are implemented. As such, it does leave you open for attack on the new Pokémon. There are numerous Entry Hazards which can be employed in order to damage Pokémon when they switch in. The Shed Shell item will always allow the Pokémon to switch, even if abilities and moves would normally prevent it.

Pursuit

If you target a Pokémon that is about to switch out with the move Pursuit, the move Pursuit will occur before the switching occurs and will inflict double the damage it would normally do. This is very handy if you've just switched in a Pokémon which would do severe damage to the opponent

Name	Type	Cat.	PP	Att.	Acc.	Effect
Pursuit			20	40	100	An attack move that inflicts double damage if used on a target that is switching out of battle.

Baton Pass

Baton Pass is a rather unique move. Normally, when you switch from battle, all stat raises and various conditions such as Confusion or Attract will be removed. However, Baton Pass is a move which allows you to keep these effects when you exit battle. The effects that it retains are as follows;

• All stat increases/decreases
• The user's Substitute
• Confusion
• Ongoing effects of the following moves; Aqua Ring, Curse, Embargo, Focus Energy, Gastro Acid, Ingrain, Leech Seed, Lock On, Mind Reader, Magnet Rise, Perish Song, Power Trick

With these effects, you have the ability to fully set up a Pokémon. You have a choice of who to switch in in its place.

Name	Type	Cat.	PP	Att.	Acc.	Effect
Baton Pass			40	--	--	The user switches places with a party Pokémon in waiting, passing along any stat changes.

Methods of Switching Yourself

In addition to Baton Pass, there are a few other ways to switch in battle without using the entire turn of the Pokémon. There are two different methods. First is through the item; Eject Button. This item, when the user is attacked, will disappear and cause the Pokémon to return its ball, giving you a choice of Pokémon to replace it. Unlike Baton Pass, you don't keep any of the stat changes.

Picture	Name	Effect
	Eject Button	If the holder is hit by an attack, it will switch with another Pokémon in your party.

In addition to the Eject Button, there are two moves which will do damage to the opponent and then send the Pokémon back into the party. As these moves do damage, the turn isn't wasted and if your Pokémon is faster than the opponent, you'll have the ability to switch in a Pokémon to handle the attack the opponent will throw at you.

Name	Type	Cat.	PP	Att.	Acc.	Effect
U-turn			20	70	100	After making its attack, the user rushes back to switch places with a party Pokémon in waiting.
Volt Switch			20	70	100	After making its attack, the user rushes back to switch places with a party Pokémon in waiting.

Name	Type	Cat.	PP	Att.	Acc.	Effect
Bind			20	15	85	Things such as long bodies or tentacles are used to bind and squeeze the target for four to five turns.
Block			5	--	--	The user blocks the target's way with arms spread wide to prevent escape.
Clamp			15	35	85	The target is clamped and squeezed by the user's very thick and sturdy shell for four to five turns.
Fire Spin			15	35	85	The target becomes trapped within a fierce vortex of fire that rages for four to five turns.
Magma Storm			5	120	75	The target becomes trapped within a maelstrom of fire that rages for four to five turns.
Mean Look			5	--	--	The user pins the target with a dark, arresting look. The target becomes unable to flee.
Sand Tomb			15	35	85	The user traps the target inside a harshly raging sandstorm for four to five turns.
Spider Web			10	--	--	The user ensnares the target with thin, gooey silk so it can't flee from battle.
Whirlpool			15	35	85	Traps foes in a violent swirling whirlpool for four to five turns.
Wrap			20	15	90	A long body or vines are used to wrap and squeeze the target for four to five turns.

Moves & Items Which Force Exit from Battle

In addition to that, there are a few moves and items which will force the opponent out of battle. First is the item the Red Card. With the Red Card, whenever the holder has been damaged by an opponent, the opponent is forced out of battle. The opponent does not get to choose the Pokémon to replace the Pokémon being removed. It is a one-use only item.

Picture	Name	Effect
	Red Card	A card with a mysterious power. When the holder is struck by a foe, the attacker is removed from battle.

With the moves, there are a variety. Some will do damage and knock the Pokémon out, while others will just force the opponent to leave. These moves all have a very low Speed Priority so generally occur at the end of each turn.

Name	Type	Cat.	PP	Att.	Acc.	Effect
Circle Throw			10	60	90	The user throws the target and drags out another Pokémon in its party. In the wild, the battle ends.
Dragon Tail			10	60	90	The user knocks away the target and drags out another Pokémon in its party. In the wild, the battle ends.
Roar			20	--	100	The target is scared off and replaced by another Pokémon in its party. In the wild, the battle ends.
Whirlwind			20	--	100	The target is blown away, to be replaced by another Pokémon in its party. In the wild, the battle ends.

Abilities Which Prevent Exit from Battle

If the opponent is of the Steel-type, Pokémon with the Magnet Pull ability prevent them from exiting battle
If the opponent isn't of the Flying-type or doesn't have the Levitate ability, Pokémon with the Arena Trap ability prevent them from exiting battle
If the opponent doesn't also have this ability, Pokémon with the Shadow Tag ability prevent all opposing Pokémon from exiting battle
If the Pokémon has the Suction Cups ability, the Pokémon cannot be forced from battle

Abilities Which Activate Upon Switching

When switched out of battle, Pokémon with the Regenerator ability will heal up to 33.3% of their maximum Hit Points
When switched out of battle, Pokémon with the Natural Cure ability will heal all status problems

Escape from Wild Battle

As you will often get wild Pokémon when you don't really want them, the need to escape is strong. All the moves and abilities listed above will work in a similar manner to in trainer battles, but if they would force the opponent to switch then they will end the wild battle. Here though, there is the ability to just run from the battle. The calculation to run is based upon the speed of the currently active Pokémon and the speed of the opponent. This formula is as follows

    Probability = (((UserSpeed * 32)/ (OpponentSpeed / 4))+ 30 * AttemptNumber) / 256

If you're unable to escape, then you will unfortunately be vulnerable to attack for a turn. However, there are numerous ways in order to force the wild battles to end. First, if your Pokémon has the Run Away ability, then providing it's not affected by any moves or abilities, escape from battle will be guaranteed.
There are numerous items which will also aid in the escape from wild battles. One, the Smoke Ball, can only be used as a hold item. If the Pokémon in play has it, you'll be able to escape with ease. The other three items are to be used in battle and will disappear after use. They are the PokéDoll, PokéToy and Fluffy Tail. Once the item is used, the wild battle will end

Picture	Name	Effect
	Fluffy Tail	An item that attracts Pokémon. Use it to flee from any battle with a wild Pokémon.
	Poké Doll	A doll that attracts Pokémon. Use it to flee from any battle with a wild Pokémon.
	Poké Toy	An item that attracts Pokémon. Use it to flee from any battle with a wild Pokémon.
	Smoke Ball	An item to be held by a Pokémon. It enables the holder to flee from any wild Pokémon without fail.

There are also instances in which the opponent Pokémon will flee from battle. This was commonplace in Gold, Silver & Crystal but very rare now. Typically, it only happens with Roaming Legendaries, which will try it every turn unless you trap them with the moves or abilities detailed above. Pokémon in the Safari Zone will also flee. If the opponent has moves which would force you from battle, it doesn't make you have to switch, but rather will end the battle.