As promised yesterday, I am going to explain more on my thoughts about Ferrothorn and Girantina, and why either Girantina should be tested in OU, or Ferrothorn should be tested for Ubers.
The key word being
tested.
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1: Useage
Now, I know that useage in Ubers does not correlate to useage in OU. However, it is worth mentioning that Ferrothorn is by far the most used 'OU' in Ubers, at #9, with slightly over 25% useage. Girantina is #16, with about 2/3rd the useage. This suggests, at least in Ubers, that Ferrothorn is better than Girantina.
However, there are less Fire attacks in Ubers, and far less Fighting-type attacks. There are also more Dark and Rock-type attacks. However, Ferrothorn is used more than Girantina, and, for the matter, Lugia too.
However, this is a minor point.
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2: Case for Ferrothorn being tested for Ubers
I direct your attention to this post, which explains the case for Ferrothorn being too much for OU better than I could:
http://www.smogon.com/forums/showpost.php?p=3486315&postcount=756
To put Ferrothorn's defensive stats into light, compare it to sthe main point of this argument, Giratina:
Girantina: 150/120/120
Ferrothorn: 74/131/116
At first, it seems that Girantina is significantly bulkier physically, and significantly bulkier specially. However, you then have to factor in the following:
Girantina has no form of recovery outside of Rest
Ferrothorn has Leech Seed, which works better due to his HP [Percentage-wise]
Girantina lacks any support options except for Thunder Wave and Will-O-Wisp
Ferrothorn has Thunder Wave, Spikes, Stealth Rock, Gravity, and several set-up moves.
Girantina takes normal SR damage, and is vunerable to Toxic Spikes.
Girantina is vunerable to Sandstorm
Finally; Ferrothorn's typing is better.
This, all around, makes Ferrothorn probobly a
better wall than Giratina. While Giratina can boast of Will-O-Wisp, improving his physical bulk, he just does not have the healing and residual damage factor that Ferrothorn has, nor does he have the truckload of resistances.
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Case 3: Girantina being Tested within OU
To support this, I think that it is best to provide some calculations:
Bear in mind, Girantina has NO RELIABLE RECOVERY.
All calculations will be using the EV set: 248 HP, 248 Def, 12 Sp.D, Bold Nature.
Choice Scarf Latios' Draco Meteor [Assumeing Modest]
84.7% - 100.2%
Choice Specs Latios [Assumeing Timid]
114.9% - 136%
Conkeldurr's Payback [252 Attack, + Attack Nature]
+0:
32.2% - 38.2%
+1 or Guts Active:
48.1% - 56.9% [2HKO with any form of Hazards]
+1 and Guts [Girantina could go for the Will-O to try and Cripple Conkeldurr]
72% - 84.7%
ScarfChomp's Dragon Claw: [252 Adamant]
18.3% - 21.9%
Scarfchomp's Outrage:
27.4% - 32.6%
SD Chomp's Dragon Claw: [252 Jolly, +2]
37% - 43.3%
SD Chomp's Outrage:
54.9% - 64.8%
Gengar's Shadow Ball: [252 Timid]
44.1% - 52.5%
Tyranitar's Crunch/Persuit on Switching Girantina: [252 Adamant]
37% - 44.1%
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Now, those are all common pokemon within OU. On top of hazards, many of them can 2HKO or even OHKO Girantina. Throw in Girantina being vunerable to stall itself, due to being vunerable to Toxic Spikes/Toxic, and Sandstorm as well, and you realise that it is probobly an inferior wall to Ferrothorn within the OU metagame.
Obviously, this set is best handled by special attackers, but for the Girantina to survive things like ScarfLatios' Draco Meteor, it would be making itself vunerable to Conkeldurr, Tyranitar, and Garchomp.
The list above is also by no means exhaustive. There are Ice-type attackers such as Kyurem, Abomasnow, or Rotom-F. There are also some stall pokemon who laugh at Girnatina... Ferrothorn being one of them, adoreing to leech from his Base 150 HP, which would outdo any burn damage Girnatina may have started, and resisting both of Girantina's STABs.
However, the above shows that there are pokemon that are more than capable of handleing Girantina within OU, that are commonly used. Then bear in mind the lack of reliable recovery, and the inability to cause passive damage through any means other than Toxic and Will-O-Wisp, and the case is rather clear, that Ferrothorn, an OU pokemon is superior in walling to Girantina, an Uber.
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That all said and done, the way I see it, either Ferrothorn is Uber, or Girantina is OU, because
Ferrothorn is better than Girantina. One or the other needs a test, or even both.