Where to Find Keldeo
Generation 1
Red
Blue
Yellow
Generation 2
Gold
Silver
Crystal
Generation 3
Ruby
Sapphire
Emerald
Fire Red
Leaf Green
Generation 4
Diamond
Pearl
Platinum
Heart Gold
Soul Silver
Generation 5
Black
White
Black 2
White 2
Generation 6
X
Y
Omega Ruby
Alpha Sapphire
Generation 7
Sun
Moon
Ultra Sun
Ultra Moon
Let's Go Pikachu
Let's Go Eevee
Generation 8
Generation 9
Scarlet
Violet
Keldeo Evolution Tree
Keldeo Alternate Forms
Resolute Form
Water
Fighting
Changes form if it knows the “Secret Sword” move.