Tentacool

Tentacool makes a niche for itself as the best choice for the ever-coveted role of entry hazard control in PU. With good bulk, a wide variety of support options, and most importantly, Rapid Spin, it finds itself as a top pick for many different kinds of teams. Tentacool also packs important resistances to common offensive types such as Water- and Fire, reliably absorbing those hits with its great Special Defense. However, it is very passive on the topic of damage, it can't reliably heal itself outside of the shaky and uncommon Rest, and its middling Defense leaves it vulnerable to wallbreakers such as Stoutland, Arbok, and Torterra. The final irony of Tentacool is that it's a victim of its own success: its Toxic Spikes are often swept up by the common sight of an opposing Tentacool.