He should already know it when you recruit him. If not then you can visit Electivire and relearn it.
No. Roar of time is strictly a dialga move.
It comes with Diagla. If you catch one and Roar of Time isn't there, there is a problem.
In Pokemon Mystery Dungeon Explorers of Time, Dialga doesn't have Draco Meteor as a learned move. The Dragon-Type attacks it can learn are Dragon Breath Dragon Claw Dragon Pulse Roar of Time
Giratina does not learn Roar of Time. That move is specifically for Dialga and Dialga only. Because it is Dialga's signature move. Just like Palkia's Spacial Rend and Giratina's Shadow Force. They are the only Pokemon that can learn these moves.
No, because it's a Pokemon move that only dialga can know, and dialga cant learn spacial rend. Palkia controls space so it makes spacial rend and dialga controls time which makes roar of time!
Palkia does not learn Roar of Time, that's Dialga. Palkia has it's own unique move: Spacial Rend.
If you captured Dialga on Spear Pillar in the game, it starts with Roar of Time. If you cheated for one way under leveled than the real Dialga found at Spear Pillar, it learns it at Lv. 40 in Diamond, Pearl, and Platinum. And in Pokemon HeartGold and SoulSilver, it learn Roar of Time at Lv. 46.
Dialga learns Time Realm at Lv 90 A nice lady makes Dialga learn Drago blast When you catch him he knows Roar Of Time
no roar of time and spetial rend can only be used by dialga and palkia and tugipi because toigipi learns metramone
Roar Of Time
roar of time
1. metal claw 2. roar of time 3. dragon claw 4. ancient power