I would like to bring up an issue with this analysis: http://www.smogon.com/forums/showthread.php?t=3452326
The problem is the EVs this guy has decided to give Weezing SpDef EVs and that it has already reached the GP mark. He has given Weezing 160 SpDef EVs (sounds really random) without giving a valid description as to why. This was his explanation: "The EVs with this set are to hit the extra point in Defense, then cover Weezing's lower Special Defense to allow it to withstand weak special attacks."
Now if we look at the UU tier, we can easily observe the role of Weezing in it. Weezing is a great counter to the following common UU Pokemon: Donphan, Hitmontop, Heracross, physical attacker Arcanine, Rhyperior, Flygon, Mamoswine, physical attacker Cobalion, physical attacker DD Kingdra, Bisharp, Escavalier, Weavile, Ambipom, and the list goes on.
Lets compare the damages between the EVs he invested on Weezing over a max HP and Def Weezing.
A poisoned 252 Atk Choice Band Guts Heracross Close Combat vs 252 HP/96 Def Weezing: 50.3% - 59.28%
A poisoned 252 Atk Choice Band Guts Heracross Close Combat vs 252 HP/96 Def Weezing: 44.61% - 52.69%
- A scenario from a 2HKO to a 3HKO after SR damage.
252 Atk Flygon Outrage vs 252 HP/96 Def Weezing: 38.62% - 45.81% (3 hits to KO with Leftovers)
252 Atk Flygon Outrage vs 252 HP/252 Def Weezing: 34.13% - 40.42% (3-4 hits to KO with Leftovers)
- Changes the scenario from a 3HKO to a possible 4HKO
252 +1 Atk Kingdra Outrage vs 252 HP/96 Def Weezing: 55.69% - 65.87% (2 hits to KO with Leftovers)
252 +1 Atk Kingdra Outrage vs 252 HP/252 Def Weezing: 49.4% - 58.38% (2-3 hits to KO with Leftovers)
- Changes the scenario from a 2HKO to a possible 3HKO
252 Atk Choice Band Escavalier Iron Head vs 252 HP/96 Def Weezing: 47.6% - 55.99% (2-3 hits to KO with Leftovers)
252 Atk Choice Band Escavalier Iron Head vs 252 HP/252 Def Weezing: 42.22% - 49.7% (3 hits to KO with Leftovers)
- Changes the scenario from a possible 2HKO to a 3HKO
Now what about the random 160 SpDef he has invested? What are those good for? Lets see...
0 SpAtk Milotic Scald vs 252 HP/160 SpDef Weezing: 28.14% - 33.53% (4-5 hits to KO with Leftovers)
- Takes Scald better from Milotic, but what's it going to do to Milotic?
252 SpAtk Life Orb Nidoking Ice Beam vs 252 HP/160 SpDef Weezing: 47.31% - 55.39% (2-3 hits to KO with Leftovers)
- Gets a 3HKO opportunity from Nidoking, but what's it going to do to Nidoking?
Ugh... I really can't think of any reasons to give Weezing SpDef.
The problem is the EVs this guy has decided to give Weezing SpDef EVs and that it has already reached the GP mark. He has given Weezing 160 SpDef EVs (sounds really random) without giving a valid description as to why. This was his explanation: "The EVs with this set are to hit the extra point in Defense, then cover Weezing's lower Special Defense to allow it to withstand weak special attacks."
Now if we look at the UU tier, we can easily observe the role of Weezing in it. Weezing is a great counter to the following common UU Pokemon: Donphan, Hitmontop, Heracross, physical attacker Arcanine, Rhyperior, Flygon, Mamoswine, physical attacker Cobalion, physical attacker DD Kingdra, Bisharp, Escavalier, Weavile, Ambipom, and the list goes on.
Lets compare the damages between the EVs he invested on Weezing over a max HP and Def Weezing.
A poisoned 252 Atk Choice Band Guts Heracross Close Combat vs 252 HP/96 Def Weezing: 50.3% - 59.28%
A poisoned 252 Atk Choice Band Guts Heracross Close Combat vs 252 HP/96 Def Weezing: 44.61% - 52.69%
- A scenario from a 2HKO to a 3HKO after SR damage.
252 Atk Flygon Outrage vs 252 HP/96 Def Weezing: 38.62% - 45.81% (3 hits to KO with Leftovers)
252 Atk Flygon Outrage vs 252 HP/252 Def Weezing: 34.13% - 40.42% (3-4 hits to KO with Leftovers)
- Changes the scenario from a 3HKO to a possible 4HKO
252 +1 Atk Kingdra Outrage vs 252 HP/96 Def Weezing: 55.69% - 65.87% (2 hits to KO with Leftovers)
252 +1 Atk Kingdra Outrage vs 252 HP/252 Def Weezing: 49.4% - 58.38% (2-3 hits to KO with Leftovers)
- Changes the scenario from a 2HKO to a possible 3HKO
252 Atk Choice Band Escavalier Iron Head vs 252 HP/96 Def Weezing: 47.6% - 55.99% (2-3 hits to KO with Leftovers)
252 Atk Choice Band Escavalier Iron Head vs 252 HP/252 Def Weezing: 42.22% - 49.7% (3 hits to KO with Leftovers)
- Changes the scenario from a possible 2HKO to a 3HKO
Now what about the random 160 SpDef he has invested? What are those good for? Lets see...
0 SpAtk Milotic Scald vs 252 HP/160 SpDef Weezing: 28.14% - 33.53% (4-5 hits to KO with Leftovers)
- Takes Scald better from Milotic, but what's it going to do to Milotic?
252 SpAtk Life Orb Nidoking Ice Beam vs 252 HP/160 SpDef Weezing: 47.31% - 55.39% (2-3 hits to KO with Leftovers)
- Gets a 3HKO opportunity from Nidoking, but what's it going to do to Nidoking?
Ugh... I really can't think of any reasons to give Weezing SpDef.