Marshy tall grass habitat
Main game habitat #054
To make marshy tall grass in Pokopia, place 4 Yellow tall grass and 2 Muddy Water together. It attracts 2 Pokémon: Paldean Wooper and Clodsire.
Tall grass growing in a marsh. Pokémon use this to wipe mud off themselves.
Items to place
Yellow tall grassx4
Muddy Waterx2

Pokémon it attracts
PokémonRarityTimeWeatherRegions
A Pokémon only appears once its region, time and weather line up. Find any of them by condition in the spawn finder.