Dialga (Origin Forme)

Dialga's Origin Forme was revealed near the end of Pokemon Legends - Arceus, as a unique forme to this Pokemon that changes it on a fundamental level, and while it keeps the same Dragon/Steel typing as its basic forme, its stats undergo a change during the transformation. While it's not terribly significant, Dialga - Origin Forme's stats switch up to be slightly more defensive, outright trading a few points in Attack for a few points in Defense. This should mean that it's the inferior Dialga for raids, but that couldn't be farther from the truth! With Dialga - Origin Forme's release, we also saw the release of its signature move: Roar of Time. This Dragon Type Charged Move is pretty brutal, and raises this deity of time to new heights as it breaks the very fabric of time just to do away with whatever is in front of it. Add to this a Steel sub-typing to make it one of the few Dragons with no Dragon weakness, and Dialga - Origin Forme is a very strong all-around pick that is very safe to use in many Dragon raids, making it a worthwhile investment.

Adventure Effect

And Raid utility isn't the only reason to use Dialga - Origin Forme! Alongside Palkia - Origin Forme, this is the first individual Pokemon that's capable of directly effecting the way that Pokemon Go is played! Any Dialga - Origin Forme that has the move Roar of Time is capable of using a unique Adventure Effect that will pause the timer for most limited-duration items such as Star Pieces and Incense, extending them for up to 2 hours per individual use, and up to 24 consecutive hours total. This gives added value to Dialga - Origin Forme, and makes it a must-have for any trainer's team!

Best PvE Offensive Moveset

• Dragon Breath and Roar of Time* is Dialga - Origin Forme's patented Dragon-countering moveset.
• Draco Meteor is okay, but it's definitely the inferior option here.
• Metal Claw and Iron Head can work as a Steel Type moveset, though normal Dialga is better suited for that, and even it isn't great in the role.
• Thunder is an easy skip.

Dragon Breath is, frankly, the main source of Dialga-O's offensive power, and is thus the correct choice for fast move. It provides an incredible amount of consistent Dragon-type damage.

Iron Head is Dialga-O's cheapest move, and while it is (on its own) mediocre, it provides solid anti-Fairy coverage, and is generally good enough.

Roar of Time is generally the secondary best option, due to its mind-boggling damage output and lack of drawbacks. However, as the move is rather exclusive, some trainers may not have access to it. Thunder is a viable alternative, hitting Flying-types and Kyogre and being slightly cheaper than Roar of Time. Draco Meteor is strictly inferior to Roar of Time, as it possesses the same power and cost, but has a significant Attack self-debuff that can drop Dialga-O's power to unusable levels.