Yes, lucky players can encounter the shiny version of both Incarnate and Therian Forme Landorus in Pokemon GO. However, finding this shiny Legendary is very rare.
Any time you beat a Landorus Raid, there is a 5% chance that the Landorus you encounter afterward will be a shiny one.
This means that, on average, you will encounter a shiny version 1 out of every 20 times you encounter Landorus. This is the standard shiny odds for catching Legendary Pokemon in Pokemon GO.
The best time to catch a shiny Landorus is during the Pokemon GO Landorus Raid Hour, so make sure you don’t miss if you’re after one. For the duration of this Raid Hour, Landorus Raids will be taking place much more often!

What Does Shiny Incarnate Forme Landorus Look Like?
The shiny version of Incarnate Forme Landorus is light orange with dark orange markings. This is slightly different to the dark orange and dark pink color scheme of the standard version of this Legendary.
Additionally, the tail of Landorus’ shiny version is a brighter brown compared to the normal Landorus.
You can also catch shiny Thundurus as well as shiny Tornadus in Pokemon GO, provided they are currently in Raids.

What Does Shiny Therian Forme Landorus Look Like?
Shiny Therian Forme Landorus is bright orange with dark orange markings and has a bright brown tail. This is the same color scheme as the shiny Incarnate Forme of this Legendary Pokemon.
While it may not be too different to the orange and dark pink standard Therian Forme Landorus, any shiny Legendary Pokemon is worth catching!
In addition to Landorus, there are dozens of Legendary Pokemon to catch in Pokemon GO. Of course, many of these also have shiny versions.
