Can wild Pokemon actually flee away?

Question

I know Run Away holders like Aipom can fly away from a battle. But, can wild Pokemon that don't have Run Away flee from a fight?

Quotation from Lillipup's page for example:

Black: It faces strong opponents with great courage. But, when at a disadvantage in a fight, this intelligent Pokémon flees.
Y: Though it is a very brave Pokémon, it’s also smart enough to check its foe’s strength and avoid battle.

Comments

I believe the only way to escape is via Teleport, but don't quote me on that.

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i think the only thing i've encountered is teleport, roar, and whirlwind

Answer 1

From generations 1-8, Pokemon can only escape if they use a Teleport. The player can use moves like Roar, Dragon Tail, Circle Throw or Whirlwind for force the battle to end. The battle ends because these moves are designated to swap the opposing Pokemon out.

Roamers naturally attempt to flee after every turn. You can block them from fleeing using a trapping move.

Gen 2 exclusively, some species of wild Pokémon can flee from battle. This can be prevented the same way as preventing roomers. The Pokemon able to flee are as follows: Magnemite, Grimer, Cubone, Tangela, Mr. Mine, Eevee, Porygon, Articuno, Zapdos, Moltres, Dratini, Dragonair, Togetic, Quagsire, Umbreon, Unown, Snubble, Heracross, Teddiursa, Delibird, and Phanpy.

In Let's Go Pikachu/Eevee, Pokemon regularly try to escape shortly after performing their cry animation. Unfortunately, this can't be avoided.

In Sun and Moon, Ultra Sun and Ultra Moon, there is a scripted battle against Nihilego during the player's first visit to Aether Paradise. This Nihilego, which cannot be caught, is scripted to flee on the fifth turn of battle. This flee can be avoided by using a trapping move. Source

Pokémon from the Safari Zone can flee, though it’s not really a battle.

Other than those particular instances, Pokemon cannot flee from battle.

Comments

In GSC, a specific few non-roaming wild species also have a chance of fleeing the battle each turn without using a move, a mechanic that wasn't retained for any other games.

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Never heard of that, can you link me to more info so I can update my answer?

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That information is already on the Bulbapedia page that is your source. You might want to read the entire page.

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@sumwun, you can tell me without being rude, but thanks

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I don't know what you think is rude.

Answer 2

Wild Pokemon can only escape if they have run away, use Teleport, or you or they use Roar or Whirlwind.

Roaming Legendaries can escape by themselves all of the time, unless you trap them with a partial trapping move (Ex: Fire Spin), or use Mean Look on them. If your Pokemon has Shadow Tag, then they will also not be able to escape. If they have Roar, however, they will still escape.

Source: Experience

Please feel free to comment any mistakes, I will make the edits when I can.

Comments

How does Roar make the wild Pokémon flee if they use it?

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They switch you out, which ends the wild battle.

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Alright. Thanks.

Answer 3

Certain wild Pokémon can escape from battle. Roaming Pokémon attempt to flee every turn, unless they are prevented from fleeing (such as by trapping moves).

In Safari Zones during a Safari Game, Pokémon can escape from battle. The rate of escape is lowered by throwing Bait (RBYFRLGDPPtHGSS) (while the catch rate is also lowered) or Pokéblocks (RSE), and the rate of escape is raised by throwing Rocks (RBYFRLG), Mud (DPPtHGSS), or by "going near" (RSE) (while the catch rate is also raised).

Generation II
In Pokémon Gold, Silver, and Crystal, in addition to the roaming Legendary beasts, a few species of wild Pokémon can escape from battle. Much like roaming Pokémon, these Pokémon may attempt to flee immediately before they would use their move, and they will not attempt to flee when affected by trapping moves (such as Mean Look or Wrap), sleep, or freeze.

All Pokémon that can flee were intended to be more likely to be caught in a Fast Ball, but due to a programming error, only Magnemite, Grimer, and Tangela actually are more likely to be caught in a Fast Ball.

source