The 2023 promo art: Shiver can be seen on the lower right wearing the outfit.
shiver (dark chocolate) (splatoon)
Official alternate costume of Shiver from the Splatoon series.
It was first featured in the promotional artwork for the "Dark Chocolate vs. Milk Chocolate vs. White Chocolate" Splatfest event in January 2023.
A different outfit was featured in the promotional material for the January 2025 rematch of the same Splatfest theme.
This tag implicates shiver_(splatoon) (learn more).
