In December 2005, prior to the release of Pokémon Diamond and Pearl, CoroCoro Comics January ran a contest where fans could name the strongest Dragon-type move.Draco Meteor was the move that won this contest.
Because this was prior to the release of Diamond and Pearl, Roar of Time was not revealed or simply didn't really count yet.
So regardless of Base Power, Draco Meteor still holds the title of the strongest Dragon type move. Also, Draco Meteor is usually a better choice than Roar of Time, as the recharging turn can be extremely risky.
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