Diamond: It has the power to control time. It appears in Sinnoh-region myths as an ancient deity.
Pearl: A Pokémon spoken of in legend. It is said that time began moving when DIALGA was born.
Platinum: A legendary Pokémon of Sinnoh. It is said that time flows when DIALGA’s heart beats.
Heartgold: This Pokémon completely controls the flow of time. It uses its power to travel at will through the past and future.
Soulsilver: This Pokémon completely controls the flow of time. It uses its power to travel at will through the past and future.
Black: A legendary Pokémon of Sinnoh. It is said that time flows when Dialga’s heart beats.
White: A legendary Pokémon of Sinnoh. It is said that time flows when Dialga’s heart beats.
Black-2: A legendary Pokémon of Sinnoh. It is said that time flows when Dialga’s heart beats.
White-2: A legendary Pokémon of Sinnoh. It is said that time flows when Dialga’s heart beats.
X: A Pokémon spoken of in legend. It is said that time began moving when Dialga was born.
Y: It has the power to control time. It appears in Sinnoh-region myths as an ancient deity.
Omega-Ruby: A Pokémon spoken of in legend. It is said that time began moving when Dialga was born.
Alpha-Sapphire: It has the power to control time. It appears in Sinnoh-region myths as an ancient deity.
Legends-Arceus: This Pokémon is revered as a deity in Hisuian legend. The birth of Dialga was what caused the vast river of time to begin flowing in our world.