Question

I though that Rotom H was the one in OU but apparently it is UU. What is the reason for its place in OU?

Answer 1

Pros

• Fantastic Water/electric typing which means only one weakness(grass).
• Can Effectively counter some of the game's most prominent threats, such as Gliscor and Landorus.
• Since 5th gen, the new Volt Switch further bolster Rotom-W's abilities as a Choice Scarf or Choice Specs user, allowing it to pull off an effective hit-and-run strategy while still dealing good damage in the process.

Cons

• Mediocre speed and defences so they can One Hit Rotom
• Latios, Latias, Blissey, and Chansey are the big four that will almost assuredly give Rotom-W trouble. Grass types may also give problems. Pokemon like Virizion has great Special Defense to sponge Rotom-W's attacks, and it can either set up Calm Mind or heal up with a super effective Giga Drain.

Comments

It actually turns into Electric-Water, not Water-Ghost.

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Tricking a choice Scarf onto Blissey and Chansey Cripples them, which usually works in your favor.

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And Rotom - W's defenses aren't bad- his HP is, though. And don't forget Scizor and Rotom W combo.