Decidueye

Decidueye is a potent wallbreaker thanks to Nasty Plot letting it break past even checks like Incineroar and Garbodor with Z-Moves. Decidueye's able to use its good defensive typing, recovery in Roost, and bulk to switch into Pokemon like Heliolisk and Slowking to set up and stay healthy. Additionally, Decidueye can provide further utility to teams via U-turn and Defog. Unfortunately, Decidueye's Speed tier is average at best, leaving it outsped and revenge killed by threats like Rotom, Delphox, and Sigilyph. Decidueye is also easily Pursuit trapped by Aerodactyl, Sneasel, and Absol because of this. Furthermore, Decidueye struggles to break past Incineroar without prior chip damage, and its Defog sets are much more passive than its Nasty Plot one.