Toxapex

Water

Toxapex's amazing bulk and its ability Regenerator make it one of the best pivots available to Water teams. Its typing further augments its natural bulk, providing it a valuable neutrality to Grass-type moves that is greatly appreciated by Water teams. This allows it to take on threats such as Mega Charizard Y and Volcarona better. Toxapex also has access to plenty of useful utility moves, notably Recover, Toxic Spikes, and Haze as well as a decent STAB move in Scald that may burn the foe, rendering most physical attackers like Mega Scizor near useless. However, Toxapex has very little actual offensive presence due to its abysmal offensive stats. Moreover, its low Speed stat leaves it vulnerable to stallbreakers utilizing Taunt or Substitute, and it stacks another weakness to Ground, which Water teams generally tend to have a lack of switch-ins to. Despite its generally passive nature, however, Toxapex manages to fit well on not only stall team archetypes but balance teams too.

Poison

Toxapex is the best defensive pivot available to Poison-type teams, thanks to its Regenerator ability enabling it to take damage and recover it when switched out and its great Defense and Special Defense stats allowing it to take heavy hits from Pokemon such as Mega Charizard Y and Mega Pinsir. Toxapex's Water typing also helps Poison-type teams deal with the matchup against Bug-type teams by enabling it to use Haze on Volcarona and Mega Scizor whilst resisting both of their STAB attacks. Haze + Icium Z allows Toxapex to check major threats to Poison teams such as Taunt Kommo-o that can otherwise easily break past the rest of the type. The same Water typing also makes it a key Pokemon when dealing with Fire-type teams as well as some Flying-type teams that rely on Mega Charizard Y as the wallbreaker. Toxapex's solid movepool for a bulky Pokemon gives it reliable recovery through Recover as well as utility moves in Toxic Spikes and Haze to support the rest of the team. Scald is Toxapex's only commonly used attack, and its 30% chance to burn gives it a good chance to shut down physical threats to Poison-type teams, such as Mega Gallade and Landorus-T, when spammed. However, Toxapex has to rely on this move for dealing damage and hope for burns when faced with Taunt users; otherwise, it is dead weight to the team.