Why is Silvally a legendary?

Yes, they are legendary

They are in the Undiscovered egg group, meaning they cannot breed with Ditto. This is also the case for legendary and mythical Pokémon.

Is type null a legendary? Is type null a legendary? Type: Null (Japanese: タイプ：ヌル Type: Null) is a Normal-type Legendary Pokémon introduced in Generation VII. It evolves into Silvally when leveled up with high friendship....
Is Silvally a legendary? Is Silvally a legendary? Silvally is considered a legendary Pokémon, due to its rarity, meaning shiny variants are even rarer. So, if you want a free one, an event is coming for you to get a free shiny Silvally. Go to Game between November 3 and November 16 to get...
Why does Silvally have a mask? Why does Silvally have a mask? However, Silvally's wild nature made it impossible to command, so they fitted it with a mask in order to control it, and it became Type: Null....
Has any city won Super Bowl and World Series in same year? Has any city won Super Bowl and World Series in same year? 1979: Pittsburgh Steelers and Pirates The Pittsburgh Steelers, currently the last unbeaten team in the NFL, won the Super Bowl 35-31 over the Dallas Cowboys. The Pirates won the World Series over the Baltimore Orioles in seven games....
Why was Type: Null created? Why was Type: Null created? Type Null was created specifically to destroy Ultra Beasts since they pose a threat to the Pokémon world. The Aether Foundation wanted a creature that could repel the Ultra Beasts if they ever got out of control and started wreaking havoc....
What animal is Silvally? What animal is Silvally? Type: Dragon: It has the ability to change its type based on the memory it's holding. This is its Dragon-type form....