My reservations aren't in the OP, but I'll write an entry for them.
<h3>Rhydon</h3>
<img src="/download/sprites/bw/112.png" alt="" />
<p><strong>Typing:</strong> Ground / Rock <br />
<strong>Base Stats:</strong> 105 HP / 130 Atk / 120 Def / 45 SpA / 45 SpD / 40 Spe<br />
<strong>Abilities:</strong> Lightingrod / Rock Head / Reckless</p>
Although Rhydon was cursed with a horrible defensive typing that gives it many crippling weaknesses, its superb defenses thanks to Eviolite make up for that. Thanks to the boost from Eviolite, Rhydon has a Defense that reaches unmatchable levels, allowing it to take repeated onslaughts from attackers such as Entei and Escavalier. Rhydon also has access to Stealth Rock to lay the hazard, so it can be helpful for the team. Rhydon also boasts a high 130 Attack stat, as well as the coveted STAB EdgeQuake, ensuring it's no sitting duck either. Firthermore, Rhydon's resistances to Normal and Fire allow it to effectively take on powerful attackers such as Bouffalant and Entei with ease. However, Rhydon's biggest downfall is its lack of reliable recovery, not even Leftovers, so any damage done is going to be permanent without Wish support. It also has an atrocious Special Defense, meaning many special attacks can take it down in a flash, especially Grass and Water-type attacks. However, Rhydon is a behemoth who should not be overlooked as a defensive threat.
<h3>Roselia</h3>
<img src="/download/sprites/bw/315.png" alt="" />
<p><strong>Typing:</strong> Grass / Poison<br />
<strong>Base Stats:</strong> 50 HP / 60 Atk / 45 Def / 100 SpA / 80 SpD / 65 Spe<br />
<strong>Abilities:</strong> Natural Cure / Poison Point / Leaf Guard</p>
While she might not look like the part, Roselia is a great asset to defensive teams thanks to many qualities. Eviolite boosts her defenses to great levels, and thanks to her Grass / Poison typing, this allows Roselia to serve as an effective special wall, taking onslaughts from some of RU's top special attackers such as Sceptile, Nidoqueen, and Lilligant. Her good perks don't stop there; she has access to Spikes, making her one of the best at hazard laying for a stall team. She also has access to Natural Cure, allowing her to heal off any status that cripples her as well as use Rest effectively, as she can fully restore HP and switch out curing from the sleep. She also boasts a decent 100 Special Attack stat, giving her offensive presence with Giga Drain and Sludge Bomb to hit decently hard. She does have an atrocious Defense stat and some crippling weaknesses, but with her ideal support movepool, great bulk, and good typing, Roselia makes a great defensive supporter when needed.