The new formes of Platinum- A competetive discussion

Not everything has been revealed about rotom's 5 new formes, but all will share the same new stat line, which is as follows:
HP:50/Att:65/Def:107/SpAtt:105/SpDef:107/Spd:86
Typing is also not yet confirmed on whther or not it will change.
Changes include an increase in every stat except speed (A reduction of 5) and HP (Which follows the trend of all alternative forms retaining the same base HP).
No changes to movepools or alternative movepools have been uploaded yet, although each form is expected to have its own pool with suitably fitting moves:
Frost Forme: Blizzard
"Oven" Forme: Overheat
"Mower" Forme: Leaf Stom
"Fan" Forme: Air Slash
These are the ones that have been confirmed. Serebii's scan of the "Washer" Forme has thus far been impossible to translate.

Notable changes that will impact rotom's standing in the metagame:
-Stats: Rotom has recieved a substantial boost to most of its stats. While the extent of the attack increase's use is not yet known (It is safe to predict that a possesed lawnmower will be using some physical evil), all other boosts seem like they will be extremely benficial. Both of its defences has made a large jump to what could possibly be described as "Above average", which could aid in its role as screen support and make WoW an even better choice on it. The boost in SpAtt could make rotom a more signigicant special-sweeping threat, with a +15 SpAtt boost to a -5 Speed trade-off.
-Movepool: While the full extent is still not known, it is easy to presume that the moves gained through the various formes will mean a certainly more varied movepool, and a far more potent offensive one. Up until this point rotom has had STAB'd shadow balls as it's most threatening move- Of the moves we know, it will be gaining base 140s amongst other things. The coverage it can offer will also increase, since up until this point the more agressive specs varriant has been reliant of Hidden Power to make up for lack of it.

Shaymin's Sky Forme has the following stat changes:
HP:100/Att:103/Def:75/SpAtt:120/SpDef:75/Spd:127
This new build is clearly more aggressive, with an increase in offensive stats and decrease in the defensive ones (With HP again remaining stationary).
The new movepool is also more agressive, with Growth taking defence curl's spot as a lvl 1 move and other more powerful moves like air slash and leaf storm being implemented.
It has also lost the ability of natural cure, to be replaced with serene grace.

Notable changes that will impact Shaymin's standing in the metagame:
-Typing: The introduction of flying type has brought mixed blessings to shaymin. The loss of bug weakness has been replaced with a rock one, it has gained a quad resist to grass and a quad weak to ice, and has developed a ground immunity in exchange for its electric resistance. This certainly shuffles what could once be classed as a counter, and has also brought about a weakness to the ever-popular stealth rock
-Stats: As above, the changes to shaymins baseline have helped in some ways but hindered in others. Obiously shaymin can now act as a more offensive threat, but the extent of changes to its movepool are not yet known and therefore its increase in potency cannot be fully judged. Defensively, the sky forme has certainly suffered. A drop in stats, combined with new problems such as a quad weak and loss of Nature Cure mean that shaymin's sky forme will have trouble being the supporting option that the land form can be.
Ability: Another mixed blessing. The double chance of a move's secondary ability will pay off in instances, for example the current movepool will certainly make use of seed flares with an 80% chance of dropping a foe's SpDef, meaning even special walls will be conquerable. However the loss of natural cure will mean that sky forme will not be able to stat absorb like its predecessor

As with all other forms, the full extent of the change between the two formes is not yet known due to unreleased movepools. However the following changes have been found:
HP:150/Att:120/Def:100/SpAtt:120/SpDef:100/Spd:90
Compared to the other new formes' stats, Giratina has not been subject to drastic ones. A +20 in both offenses and -20 in both defences still leave the stats moderately similar, but will no doubt cause a drastic change in roles.
Ability has also changed, from pressure to levitate.

Notable changes that will impact Giratina's standing on the metagame:
Stats: While still distinctively "average" when placed in context to the rest of the uber tier, the Origin Forme will still undergo a lot of changes. The more offensive build could lead to more tank-like roles being created (Moveset permitting) rather than walling, or give possibilities as a choice sweeper
Ability: The ability is a mixed blessing on Giratina. The loss of Pressure-stalling is replaced by an immunity to ground type moves, most notably earthquake. Both offer different opportunities however, and levitate could still become more appealing with the arrival of Origin Forme's full movepool