Question

What are the best wall Pokemon in Gen 8 Battle Stadium Doubles?

Comments

What format?

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What focuses on HP, Defense, and Special Defense.

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This question really can't be answered without more context.  Singles?  Doubles?  OU?  Ubers?  Other team members?

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Doubles

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Well one of them is unplayable Eternamax Eternatus and the other one is Shuckle. If you think he's an issue choose Toxapex.

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Taxapex I guess, great defenses.

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@Corviknight I edited this question to be clearer about the format you're playing. If you're playing VGC 2020 or Doubles OU instead of BSD, then please change what I added.

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In doubles, walls with intimidate are usually better than walls without intimidate. So the best one is probably Incineroar.

Answer 1

Incineroar @ Figy berry
Ability: intimidate
EVs: 252 HP / 4 Def / 252 SpD
Careful nature
- fake out
- darkest lariat
- flare blitz
- parting shot

Intimidate and fake out are both good things to have on walls.
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