Golem B -> A-
Our beloved friend Mr. Golem is becoming more and more viable as time goes on. People are running spin more even on offensive teams and his qualities are really showing. Of course he still has the same weaknesses, and people are trying to run coverage like Surf Tar and Surf Lax to catch him out, but surely that is a testament to how important he is. Teams with Fire Lax get spun on easily, which is important since we've seen quite a bit of STalk Fire Lax due to Jynx's popularity, and he wins the Spikes war vs Toxic'd Cloysters. I think B is too low for a mon that changes the way we think about the Spikes war.
Houndoom C+ -> B-
I've been a fan of Houndoom for some time, and I think people are starting to see its merits in the current metagame. It has the strongest Pursuit in the game and is not 4x weak to Dynamic Punch like Ttar. The ability to trap the likes of Jynx, Missy, Eggy and Gar is incredibly important. It can force Pursuit 5050s with Cloyster, trap Skarmory for some chip damage, and its STAB Fire Blast (doing 24.8 - 29.2% to Snorlax) can come in handy with its punch and burn chance. It only needs Fire Blast and Pursuit, and its last moves are customisable. Some people run STalk to absorb sleep. I don't like this as it means you can no longer trap. Some run Toxic or Thief, which can be really helpful for wearing down incoming Suicune / Raikou / Snorlax. Counter can catch some things by surprise, and Roar can shuffle in something to trap. While still a niche pick, I think it fairs a lot better vs the current metagame than anything else in its current rank, and thus deserves to move up.