Magneton & Hariyama deserve in C tier. D Tier implies that they are shitty, but slightly better than Metang lol. The fact that they these two are rated lower than Ferroseed is disgraceful!
Don't forget Magneton shares the same base SpA as Moltres with the special moves to abuse them. It has base 70 Speed, too; just enough to be faster than Kabutops and Nidoqueen and O-2HKO with Tbolt and HP Ground, respectively. Not to mention it possesses a unique niche of trapping Steels, which is still useful in RU. Magneton is an auto-kill on Aggron, for instance. That annoying Ferroseed is no more. Magneton can shave off half of Steelix's health for physical sweepers to easily break past it. Magneton can get rid or soften up Escavalier so it wont be checking Grass or Psychic-types anymore, etc.
No Fighting-type in RU does Trick Room sweeping better than Status Orb Hariyama - with Close Combat, Facade, Stone Edge, and Bullet Punch / Bulk Up / Ice Punch, there's very little the opponent can throw at Hariyama that can tank 2 hits from it. A good ole BU + 3 Atks at Lefties can also decently serve as an effective tank for RU teams.