What is your Top 5?
Some personal preferences here over the outright best and/or most broken, but I believe these 5 are some of the best mons to build teams around or with in the entire tier. It's just a lot of good glue. Gambit, D-nite, and Rillaboom have 3 of the best priority available, which is extremely important for gen 9. I would add Raging Bolt to that after the latest DLC, but it doesn't make the top 5 cut for me. When I'm building a team, I generally start with at least one or two of these five somewhere in there. Stall would obviously be different.
deserves an honorable mention. But it lacks the overall defensive utility of these other mons.
Who’s the most overrated mon in OU?
or
IMO, Skarmory is just not as good as Corv. And if you want a passive spiker with a ground immunity, use Gliscor. Gliscor can absorb status, too. There is maybe a role compression case for Skarm sometimes with the typing and Whirlwind. But in general, take Corv and/or Gliscor depending on your team's needs. They are better mons.
Iron Boulder belongs in UU or UUBL or whatever lower tier. The only reason why it isn't a clear #1 for me is because I don't think many players are high enough on it to overrate it in the first place. This should drop soon.
gets an honorable mention. It avoided this spot purely because something like Tera Fire can be used to make a very reliable attacker on more otherwise more defensive teams. On more offensive teams, I feel there are usually better options except in niche cases. It's useable. But I tend to find it underwhelming.
Who’s the most underrated mon in OU?
or
I find Corviknight to be more useful than Skarmory on average. It has better mixed bulk and can be invested for similar defensive bulk. It's more useful as a pivot, too. So it tends to be less of an outright momentum sink. The Defog is not nearly as useless with Ghold in the tier as some people think because you have U-Turn and teammates. You just need to actually use your head with it this gen. Skarmory has spikes. But there are much better spikers for the tier. The main thing Corviknight lacks is phasing, I guess.
I have done extensive testing with Deoxys-Speed and I still strongly feel that it is excellent. It's not one of these mindless mons where you can't think. And you need to optimize the EVs correctly (like limiting your speed investment) to get the most out of it. But it is very strong, particularly as a mixed attacker. There is also the fact that its speed tier make it a better PP staller than D-Defense. It's just an excellent mon and it is largely underutilized.
Who do you think will rise/drop?
Rise:
Drop:
What’s your favorite anti-stall core/set/mon?
Tera Dark Knock Off is just very hard to switch into. Mixed attacking means you can hit dedicated physical or special walls like Dondozo or Blissey with the other attacking type very hard. You can potentially be played around by a good player, but it's a gamble in many cases. Theoretically, there are only a handful of mons that can safely switch into it.
And this is another reason why Corv is better than Skarm. A mixed attacking D-Speed can do about 40-49% with Life Orb Ice Beam. A fully defensively invested Corv will only take about 29-35% from the same special attack, making recovery much more reasonable. This is just one example of Corv just being a better all purpose wall without special defense investment.