With 3 Croagunks on the bench, a Garbodor with a stadium to poison the opponent, and Toxtricity VMAX's G-Max Riot, you'll be dealing 240 damage per turn, plus 70 poison damage before your opponent's turn begins, thus knocking out most pokemon easy.
Piers helps you find your important poison ability pokemon while granting special energies for quicker setup. Toy Catcher pulls in easy kills on a VMAX who narrowly survived due to a switch or escape rope, and scoop-up nets help clear bench space when Toxtricity gets low. Spikemuth makes retreating even more difficult, leaving a high-hp VMAX with 10hp if they got hit by the aforementioned poison combo. This deck is pretty lit ngl.