Thundurus-T: C > C+
A super good defensive typing paired with great offensive stats, especially on the special side allows Thundurus-T to function as a fast special sweeper, especially in a meta where the offensive powerhouses have made OU great again. Lack of access to Roost and weakness to Stealth Rock damage handicaps Thundurus-T (Like it does with its buddies, Tornadus-T and Landorus-T, although the latter suffers less from Stealth Rock), but in spite of this, it strikes fear into the hearts of offensive teams thanks to Agility, and can then proceed to boost up with Nasty Plot before completely decimating its targets with Thunderbolt, Hidden Power Ice, or Z-Thunderbolt. Even Zapdos, who has access to Roost, will be at the mercy of this monster as it tears through it with Hidden Power Ice. Yeah, it does face competition from pokemon such as Tapu Koko and Mega Manectric, which both have better speed tiers, but they either have worse defensive typings in the case of Tapu Koko, or don't have access to key moves such as Taunt and U-Turn, in the case of Mega Manectric. So overall, my point is here that Thundurus-T isn't that bad as to be imprisoned in C, but it can't aim for anything higher than C+ as its speed is decent, likewise with Mega Garchomp, but not that good as to outspeed a solid chunk of the tier, however, its speed tier is enough to check threats such as Landorus-T, Zygarde (Which are both Ground-Types), Tapu Lele, Mega Medicham, and even Mega Charizard Y. It also has a CRIPPLING Stealth Rock weakness, meaning that Thundurus-T is reliant on entry hazard removers such as Zapdos and Mega Charizard (both forms) in order to not die to Stealth Rock, although it has access to Defog. A weakness to Ice-Types may not sound like something so severe as to kick this beast down to UR, but the 5 viable Ice-types can come in and offensively pressure it, though all bar Alolan Ninetales don't want to switch into Focus Blast or Superpower. However, Weavile, Black Kyurem, and Kyurem are all particularly threatening as both of them have great attacking stats and due to their Ice typing, can exploit Thundurus-T's glass-cannon-like defenses, particularly Thundurus-T's physical defense, and prepare to hit back hard with moves like Ice Shard, Freeze Shock, and Glaciate, respectively. Avalugg could also be used as a check to Thundurus-T thanks to access to moves like Ice Ball and Ice Fang, but its lower special defense leaves it vulnerable to Focus Blast. Again, none of them want to take a Focus Blast or Superpower. Alolan Ninetales doesn't really mind Focus Blast, but its lower physical defense does leave it vulnerable to Superpower and Smart Strike. Even with its high special attack, Thundurus-T is still very reliant on Nasty Plot to boost and do damage, because otherwise, pokemon such as Ferrothorn, Latios, and AV Tangrowth easily tank it comfortably.
Anyways, here is a set that I made in pokemon showdown:
Thundurus-Therian @ Electrium Z
Ability: Volt Absorb
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 1 Atk
- Agility
- Thunderbolt
- Hidden Power [Ice]
- Nasty Plot