Hey everyone, this is my first post ever, so I´ll try not to post so stupidly. I would like to talk about two pokemon:
Groudon for B- -> B+ rank: I don´t see the reason why it is not higher. Well, I do, it depends on Red Orb, but anyways it had its greatest potential with Adaptability scarf when it used to be legal without Orb. Therefore, it can still spam insane V-Creates with STAB coverage Thousand Arrows/Precipice Blades/Earthquake. It outspeeds every of it walls (Audino-Mega, namely), ties Giratina and Ho-oh (in case you would use the latter as a check, wall), destroys common walls like Aegishlash or Registeel turns unstoppable after Shift Gear. With good sinergy, hazards, passers or pressure on the foe it can be a nightmare. Also it runs 100/160/90 defenses. They´re great to endure at least 2 hits before dieing and counterattack and can easily switch in into Knock-off´ers and much other Pokemon which will regret using a status move and not weaken it. Also it cuts off weather and checks Kyogre in a sort of way!
Gengar for A- -> A+: Gengar-Mega is not that popular, nor is its true potential well-acquainted. Mega-evolving and trapping-utility is an option which may take off-guard many unprepared teams. But I´m talking today about an offensive version: Gengar-Mega can put an enormous pressure on the foe´s team with a simple Judgement/secret Sword set. With a 130 base speed stat, it outspeeds almost any viable pokemon used in the metagame, pairing Mewtwo-Mega X and only being outsped notably by Mewtwo-Mega X. Apart from that, it literally destroys annoying walls, for instance, Giratina (even most defensive versions won´t survive 2 hits) or Aegislash, putting them in great danger and punishing any switch in. Sending in Gengar might sound risky, but it can actually take some hits or block them thanks to its two immunities along with its "unpoisonable" Poison type. It is even easier to do it with Magic Bounce, what nullifies several status-user Pokemon. It can´t also be OHKOed by common Diancie-Mega sets, but it can OHKO the -SpDef nature versions even running Timid. To sum up, there is almost nothing to block its attack (maybe Poiosn Heal Yveltal is the best) and, what is more relevant as for a reason, it can do pretty well by itself.