Gonna do descriptions if they're not there...
I'm planning to do the following:
NOTE: I realize Rock Slide is actually a common move in VGC, but I'm not sure what to say about it other than what I've written for it atm. So if it's not informative enough, please tell! (This also goes for other moves.)
Roar
<h2>Competitive Use</h2>
<p>Forcing the opponent to switch has several advantages. Firstly, the opponent has no control over what is switched in, which makes it likely that the opponent will be forced to switch again. Secondly, the switch-in is forced to take entry hazard damage, which is especially advantageous for defensive teams for which this is one of their primary damaging methods. Lastly, it can save the team from an opposing setup sweeper that has gone out of control, even if it has a Substitute up. Since the move has negative priority, this move is commonly seen on slow, bulky Pokemon, such as Giratina in Ubers, Heatran in OU, and Blastoise in UU.</p>
<p>Many defensive Pokemon have the luxury of choosing between Roar and Dragon Tail. The advantage of Roar is that it works even if the opponent has a Substitute up, whereas Dragon Tail may merely break the Substitute. This can especially be a problem in matchups such as Blastoise vs Kingdra in UU, where Dragon Tail may not even break the Substitute because the Blastoise has a Bold or Calm nature. On the other hand, Taunt disables this move, and Magic Coat and Magic Bounce reflect it. These situations cause many Pokemon to choose Dragon Tail over Roar.</p>
<h2>Related Moves</h2>
<p>Circle Throw is a Fighting-type equivalent that deals damage.</p>
<p>Dragon Tail is a Dragon-type equivalent that deals damage.</p>
<p>Whirlwind is a Normal-type equivalent that affects Pokemon that have Soundproof.</p>
Rock Polish
<h2>Competitive Use</h2>
<p>As far as boosting moves go, Rock Polish is not as universally neglected as moves that solely raise Defense or Special Defense, but it is far less popular than offensive boosting moves. The main reason for this is that the turn spent setting up necessitates the need to OHKO the opposition and try for a sweep, and yet Rock Polish does not boost attacking power at all. In spite of all this, Rock Polish is typically distributed to Rock-, Ground-, and Steel-types, most of which are very slow and desperately need a Speed increase to function well offensively, or just to outrun everything and its mother. The power that many of these Pokemon have also plays into the use of Rock Polish.</p>
<p>There are a few interesting combinations for this move. One very common way to use Rock Polish is in a "Double Dancer" set paired with Swords Dance, where the user can use either Rock Polish to outrun and demolish offensive teams, or Swords Dance to break through defensive teams. The most prominent user of this strategy in OU is Terrakion, whose awesome coverage with its STABs really help the set to work. Groudon can use a similar set in Ubers. Another use is on a Baton Pass user, such as Mew.</p>
<h2>Related Moves</h2>
<p>Agility is a Psychic-type equivalent.
Autotomize is a Steel-type equivalent that also halves the weight of the user.</p>