Cheap Shot (Endure / Sub Custap)

Moltres-Galar @ Custap Berry

Ability: Berserk
EVs: 252 SpA / 4 SpD / 252 Spe
Modest Nature
IVs: 0 Atk
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Nasty Plot
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Fiery Wrath
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Hurricane
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Endure / Substitute
As
SLDR pointed out this Walmart Yveltal has basically nothing going for it move-wise thanks to an extremely limited move pool aside from its STABs.
This is a set that has already seen usage in formats such as 1v1, but I thought the concept was interesting for the SSOU as Goltres typically doesn't see usage and it is widely unexpected. It utilizes its relative bulk to tank hits from would-be threats to set up and claim an easy and unexpected kill which can turn matchups on their heads in favor of other sweepers.
The EV spread is nothing exceptional, max SpA and Spe to hit everything as hard as possible and outspeed the occasional speed-tran, attempts to optimize bulk lose its speed and potential to sweep after it claims a kill.
Be weary that this set cannot come in on harder-hitting attackers like Tapu Koko or Victini after rocks, which it aims to kill/setup on once low. A switch into it from full can be surprising for your opponent which makes Custap such a nice addition to a mon with such limited potential in sets otherwise.
Endure is a viable option, as is Substitute. Substitute can allow you to activate your Custap against offensive switches and avoid status, while Endure is typically most useful and allows you to get Beserk and Custap in the same turn in situations where it might normally not. Additionally, it allows you to surprise RK a wide array of sweepers and tanks that teams may not be able to usually BS past.
Be mindful, this set hates Heatran since even its bulk and SpA boosting can't break Heatran, which means that it requires chip to kill from rocks and/or spikes.
[P.S.]
While this set offers less overall than other sweeper sets such as dual boost, the amount of turns required to set up and claim a kill is much less and it offers a niche surprise factor that clears an easy path for other sweepers on offensive teams.