Mega Manectric (B) -> B+ | Mega Manectric once again gets more useful in the OU tier because of one important reason:
it's the best offensive check to Flying Spam. With its blazingly high 135 Speed, Mega Manectric outspeeds
every non-Scarfed Flying-type in OU, which includes Mega Aerodactyl, who outspeeds all the other Electric-types and OHKOes them: Raikou falls to Earthquake, while Zapdos and Thundurus (both Formes) are slain by Stone Edge. Mega Manectric can avoid the OHKO thanks to Intimidate, then OHKO back with Thunderbolt. Mega Manectric also hardwalls most Scizor variants, since non-specially defensive variants are OHKOed by Flamethrower (I'm not even sure if that's a thing), while Ferrothorn, a Pokémon Raikou struggles to beat, is OHKOed by Flamethrower more than half the time after taking SR damage. Mega Manectric really makes excellent use of its Ability and Speed combined with its access to Volt Switch; Mega Manectric is one of the fastest scouts in OU capable of crippling many physical threats on the switch-in and opening an opportunity for a team member to set up for a sweep. In its regular phase, Manectric can come in on a well-predicted Electric-type move and buff its Special Attack,
then Mega Evolve to go Choice Specs with the liberty of switching moves, making many 2HKOs into OHKOs and turning it into a deadly sweeper. It's risky, but highly effective when successfully pulled off.
What keep Mega Manectric from the A-Ranks are its lack of resistances, its special frailty and its lack of power at times. It struggles to beat Mega Venusaur, unlike Thundurus-I and Raikou, among a few other Pokémon. Lastly, the thunderdog is worn down quite quickly due to its inability to hold any other item than the Manectite and thus having no Leftovers recovery; combined with Intimidate, however, Mega Manectric can stomach Knock Offs much better than any of the other Electric-types in the tier. Overall, Mega Manectric is an underrated threat in OU, be it as a reliable, fast scout or as the best offensive check to Flying Spam.
Mega Manectric for B+.
Raikou (B) -> B+ | On that note, I'd like to see
Raikou rise to B+ along with Mega Manectric. I've elaborated on their differences
many times, so I'm only going to do so again if there's demand for it. Raikou trades the ability to scout and reliably beat Steel-types for more versatility thanks to being capable to hold items: Specs makes it a killer, Assault Vest makes it a great check against many special threats and Life Orb amps up its power while retaining the ability to switch moves. Calm Mind sets are highly dangerous thanks to their great power and special survivability, while having good coverage to boot. Extrasensory helps it get past Mega Venusaur, Shadow Ball strikes the many Psychic-types hard (mainly the Eons) and Hidden Power Ice enables it to hit the many Dragon-types in the tier. It's got a great Speed of 115, too, which makes it a powerful attacker when combined with 115 Special Attack.
Raikou, like its fellow Electric-type, does have some flaws. It has more trouble getting past Steel-types, especially Ferrothorn, it's physically frail and suffers from a mild case of 4MSS when running Calm Mind. Additionally, AV is kind of slow and susceptible to being eviscerated by physical attackers. Don't let this deter you from using Raikou, though, as its versatility and overall effectiveness make it really useful when played to their strengths.
Raikou for B+.
Bottom line, these two Electric-type bruisers are quite different and each check their own shit with what they have to offer. They're fast, reliable Electric-types that can easily be fit to fit on teams that need support and are both versatile in their own way; just don't play one like the other or you'll end up with a shitty version of what you're trying to use. They're far from being in the same league as Thundurus-I and both can really easily be taken advantage of by Pokémon like Tyranitar, Mega Tyranitar and Mega Charizard X, but they're
at least on Mega Garchomp's level.
Both of these Electric-type beasts should rise to B+.
And I'm quoting my post to drop Zapdos again, since there are things that deal with Birdspam better and it's not a good Defogger due to a severe case of 4MSS.
Zapdos (B) -> B | Yeah, I think it's about time
Zapdos falls to B Rank. Thunderburd had a niche in being able to check Aegislash and a few other Steels, but with Aegislash banned, a Pokémon that Zapdos could check quite well, it's lost another one of its uses. As Albacore pointed out, Starmie now performs vastly better with Aegi out of the tier and makes for a solid hazard remover. Despite its use as a Defogger, Zapdos suffers from having a SR weakness, which hampers it a lot in that regard. As an offensive Pokémon, Raikou and Thundurus-I do the job far better and Mega Manectric provides useful Intimidate support while having the same Fire-type coverage; it's also much stronger than defensive/Defog Zapdos and has nearly unoutspeedable Volt Switches. Zapdos has good Speed at best, at 100, making it vulnerable to being RK'd as an attacker. Unlike Thundurus-I or Raikou, it has no Special Attack-boosting options and unlike Mega Manectric, running Defog gives it 4MSS: without Heat Wave it loses to several Steel-types and without HP Ice Garchomp and Mega Charizard X shit all over it. Mega Charizard X can just set up on Zapdos all it wants, too.
All in all, I feel like Zapdos has really lost its luster in OU as of now.
Move it down to B.