Vaporeon

Vaporeon is insurance against one of the best Pokemon in the tier, Mega Blastoise, and access to Wish and Heal Bell makes it a decent pick for balance teams. Vaporeon's fantastic bulk lets it blanket check other special attackers like Salazzle, Ninetales, and Swellow. Wish + Protect is fantastic for supporting teammates, and Vaporeon's extremely high HP stat accentuates its prominence as a Wish user. However, Vaporeon is often outclassed as a bulky Water-type and Mega Blastoise switch-in by Mantine, which can blanket check a plethora of special attackers, provide Defog support, and match up well against most Grass-types, arguably one of the most threatening types in RarelyUsed. Vaporeon's passive nature will give free turns to the opponent frequently, something that can leave you in an awful spot in such a fast-paced metagame. For example, Vaporeon's over-reliance on Protect to effectively use Wish allows the opponent to easily double switch to wallbreakers and setup sweepers. Vaporeon lacking Ice Beam can't keep up with aggressive hazard stack teams carrying Roserade. Vaporeon's poor offensive presence gives plenty of setup opportunities to opposing Pokemon like Mega Abomasnow and Snorlax.