Well, I guess there's nothing better to start a discussion thread than an example. Please note that the following few turns of battles are between two entirely fictional battlers, nicknamed Ash and Gary because I felt like it. They both know each other's team members, but not the movesets. It's also not the start of the battle. If you must know, Pikachu fainted already.:naughty:
Turn 1: After a double ko.
Ash sent out Heatran.
Gary sent out Scizor.
Ok, so Gary's not stupid, he's going to switch. Ash isn't retarded either, he's not going to use Fire Blast on an obvious switch.
Turn 2:
Gary withdrew Scizor and sent out Blissey.
Ash withdrew Heatran and sent out Salamence.
Yeah, he has one. Obvious switch again.
Turn 3:
Gary withdrew Blissey and sent out Latias.
Ash withdrew Salamence and sent out Tyrannitar.
Ok, fanfiction's almost over. Just one more turn. Gary knew Ash's TTar had DD, so the choice was obvious.
Turn 4:
Gary withdrew Latias and sent out Scizor.
Tyrannitar used Flamethrower!
It's super effective!
Scizor lost a shitload % of it health!
Gary's Scizor fainted!
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Yeah, I'm bad with examples. Anyway, let's look at what happened here. Anyone who played competitively for long enough will recognize that Ash had an overwhelming momentum, momentum which led to a KO. If you look at the Archived Warstories, you'll also notice that several authors refer to that "momentum". Of course, knowing that doesn't help in understanding it.
What is momentum?
That's a good question. First, let's look at the normal definition of momentum: in physics, momentum is defined as the product of velocity and mass. That means that a duck going at 10m/s has less momentum than a sumo wrestler going at 10 m/s (my old textbook used that example, hence the title of the thread).
Now, let's see how that could be applied to competitive Pokemon battling. The "velocity" part, in my opinion, refers to the smoothness in executing a strategy. The smoother it goes, the fastest you achieve your goal. The "mass" refers to the impact of the goal. Of course, spending 5 turns to try to Toxic a Blissey has less weight than spending 5 turns trying to kill a Scizor. Since the "momentum" is the result of these two, the momentum could be defined as "the result of executing a strategy correctly in order to reach a goal". That doesn't make much sense, so I'll use another example. Pikachu's still dead.
Turn 1:
Ash sent out Tyrannitar.
Gary sent out Scizor.
Same match up as last time, but the difference is huge. This time, Tyrannitar has to switch.
Turn 2:
Ash withdrew Tyrannitar and sent out Salamence.
Scizor used U-Turn.
Gary sent out Latias.
Here, Gary forced a switch, gaining some momentum. He then used U-Turn to get a perfect prediction on the switch, gaining even more momentum.
Turn 3:
Ash withdrew Salamence and sent out Metagross.
Latias used Draco Meteor.
Latias' Special Attack was blah blah...
In this turn, Gary predicted that Ash would predict that Gary would use Surf to hit Tyrannitar or Metagross, hence he used Draco Meteor to KO Salamence. In short, he overpredicted which cost him the momentum he had.
Turn 4:
Gary withdrew Latias and sent out Magnezone.
Metagross used Agility.
In previous battles, Metagross only used Meteor Mash or Explosion to score KOs, leading Gary to assume it was a CBGross. Obviously, it's an AgilityGross. Ash bluffed a set in order to gain momentum.
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No more fanfiction. I swear. These 4 turns showed us several ways to affect momentum.
Ways to gain momentum.
-Using U-Turn/Baton Pass:
This is one of the most common way to get momentum. Since these moves are basically a switch after the opponent showed his Pokemon, they allow you to instantly get momentum, and, if you had some, retain it.
-Double switching:
Double switching had a thread made about it, so I won't discuss it too much. Double switches rely on knowledge of your opponent's team and prediction. As long as you have both, you can do it correctly. Double switches are often used in chains to force switches, eventually leading to a favorable match-up, which might lead to a kill.
-Bluffing a set
This is used when you have a Pokemon like Metagross, Heatran, Tyrannitar, who often carry Choice items. If you switch the Choice item for an invisible item (read: not Life Orb or Leftovers), you can bluff that you're unable to switch move, only to surprise them with an Agility, Substitute, or just an Earthquake on the Lucario who switched into your "Banded" Pursuit.
All of these lead you to being able to force switches. At its most basic, high level competitive Pokemon is often forcing enough switches to create that window of opportunity where you can place a game-breaking move (always a Swords Dance against me for some reason. My team is SDLuke weak...).
However, when you did those three ways above, you have to be able to use it fast. If you keep trying to maintain it, eventually, your opponent will catch on and wrench it back from you.
Some of the ways you can lose momentum.
-Not predicting:
Great, you managed to force a double switch of your Lucario against your opponent's Blissey. Then you go and use Close Combat as your opponent switches in a Gengar. Momentum is based on prediction. The moment you underpredict, your opponent gets momentum.
-Overpredicting:
When your knowledge of your opponent's team is limited, don't be stupid and use high-risk, high-reward move like Focus Blast on the off chance your opponent has a Tyrannitar. Early, it's best to go for the middle-ground. Use a powerful, generic move that can punch holes through some stuff and at least dent some other stuff, like Draco Meteor or Stone Edge. Don't use the HP Electric you keep only for Gyarados either. Also, if you predict that your opponent will predict that you'll predict that he'll predict that you'll use Earthquake, you're probably too far off. Don't assume that the opponent will stay in a risky situation.
Anyway, those are my thoughts on the subject. Momentum is hard to define, impossible to measure, but it's basically forcing switches. When the momentum is against your opponent, often, he will do the basic "safe" moves, which can lead you to gain ground.
Since this isn't a monologue, here's the question: what do you think momentum is, and how can you apply that definition to Pokemon (aka, how do you win with it)? Or, if you don't believe in momentum, why not?
Turn 1: After a double ko.
Ash sent out Heatran.
Gary sent out Scizor.
Ok, so Gary's not stupid, he's going to switch. Ash isn't retarded either, he's not going to use Fire Blast on an obvious switch.
Turn 2:
Gary withdrew Scizor and sent out Blissey.
Ash withdrew Heatran and sent out Salamence.
Yeah, he has one. Obvious switch again.
Turn 3:
Gary withdrew Blissey and sent out Latias.
Ash withdrew Salamence and sent out Tyrannitar.
Ok, fanfiction's almost over. Just one more turn. Gary knew Ash's TTar had DD, so the choice was obvious.
Turn 4:
Gary withdrew Latias and sent out Scizor.
Tyrannitar used Flamethrower!
It's super effective!
Scizor lost a shitload % of it health!
Gary's Scizor fainted!
--------------------------------------------------------------------------
Yeah, I'm bad with examples. Anyway, let's look at what happened here. Anyone who played competitively for long enough will recognize that Ash had an overwhelming momentum, momentum which led to a KO. If you look at the Archived Warstories, you'll also notice that several authors refer to that "momentum". Of course, knowing that doesn't help in understanding it.
What is momentum?
That's a good question. First, let's look at the normal definition of momentum: in physics, momentum is defined as the product of velocity and mass. That means that a duck going at 10m/s has less momentum than a sumo wrestler going at 10 m/s (my old textbook used that example, hence the title of the thread).
Now, let's see how that could be applied to competitive Pokemon battling. The "velocity" part, in my opinion, refers to the smoothness in executing a strategy. The smoother it goes, the fastest you achieve your goal. The "mass" refers to the impact of the goal. Of course, spending 5 turns to try to Toxic a Blissey has less weight than spending 5 turns trying to kill a Scizor. Since the "momentum" is the result of these two, the momentum could be defined as "the result of executing a strategy correctly in order to reach a goal". That doesn't make much sense, so I'll use another example. Pikachu's still dead.
Turn 1:
Ash sent out Tyrannitar.
Gary sent out Scizor.
Same match up as last time, but the difference is huge. This time, Tyrannitar has to switch.
Turn 2:
Ash withdrew Tyrannitar and sent out Salamence.
Scizor used U-Turn.
Gary sent out Latias.
Here, Gary forced a switch, gaining some momentum. He then used U-Turn to get a perfect prediction on the switch, gaining even more momentum.
Turn 3:
Ash withdrew Salamence and sent out Metagross.
Latias used Draco Meteor.
Latias' Special Attack was blah blah...
In this turn, Gary predicted that Ash would predict that Gary would use Surf to hit Tyrannitar or Metagross, hence he used Draco Meteor to KO Salamence. In short, he overpredicted which cost him the momentum he had.
Turn 4:
Gary withdrew Latias and sent out Magnezone.
Metagross used Agility.
In previous battles, Metagross only used Meteor Mash or Explosion to score KOs, leading Gary to assume it was a CBGross. Obviously, it's an AgilityGross. Ash bluffed a set in order to gain momentum.
--------------------------------------------------------------------------
No more fanfiction. I swear. These 4 turns showed us several ways to affect momentum.
Ways to gain momentum.
-Using U-Turn/Baton Pass:
This is one of the most common way to get momentum. Since these moves are basically a switch after the opponent showed his Pokemon, they allow you to instantly get momentum, and, if you had some, retain it.
-Double switching:
Double switching had a thread made about it, so I won't discuss it too much. Double switches rely on knowledge of your opponent's team and prediction. As long as you have both, you can do it correctly. Double switches are often used in chains to force switches, eventually leading to a favorable match-up, which might lead to a kill.
-Bluffing a set
This is used when you have a Pokemon like Metagross, Heatran, Tyrannitar, who often carry Choice items. If you switch the Choice item for an invisible item (read: not Life Orb or Leftovers), you can bluff that you're unable to switch move, only to surprise them with an Agility, Substitute, or just an Earthquake on the Lucario who switched into your "Banded" Pursuit.
All of these lead you to being able to force switches. At its most basic, high level competitive Pokemon is often forcing enough switches to create that window of opportunity where you can place a game-breaking move (always a Swords Dance against me for some reason. My team is SDLuke weak...).
However, when you did those three ways above, you have to be able to use it fast. If you keep trying to maintain it, eventually, your opponent will catch on and wrench it back from you.
Some of the ways you can lose momentum.
-Not predicting:
Great, you managed to force a double switch of your Lucario against your opponent's Blissey. Then you go and use Close Combat as your opponent switches in a Gengar. Momentum is based on prediction. The moment you underpredict, your opponent gets momentum.
-Overpredicting:
When your knowledge of your opponent's team is limited, don't be stupid and use high-risk, high-reward move like Focus Blast on the off chance your opponent has a Tyrannitar. Early, it's best to go for the middle-ground. Use a powerful, generic move that can punch holes through some stuff and at least dent some other stuff, like Draco Meteor or Stone Edge. Don't use the HP Electric you keep only for Gyarados either. Also, if you predict that your opponent will predict that you'll predict that he'll predict that you'll use Earthquake, you're probably too far off. Don't assume that the opponent will stay in a risky situation.
Anyway, those are my thoughts on the subject. Momentum is hard to define, impossible to measure, but it's basically forcing switches. When the momentum is against your opponent, often, he will do the basic "safe" moves, which can lead you to gain ground.
Since this isn't a monologue, here's the question: what do you think momentum is, and how can you apply that definition to Pokemon (aka, how do you win with it)? Or, if you don't believe in momentum, why not?