Lugia weighs 216 kg (476.2 lb), according to its official Pokédex entry, and stands 5.2 m (17 ft 1 in) tall. Every game from Gold and Silver to Scarlet and Violet lists the same figure. It is light for its size: Dragonite, less than half as tall, weighs almost as much at 210 kg.
The figure is Lugia’s Pokédex weight: 216.0 kg, or 476.2 lb, at a height of 5.2 m (17 ft 1 in). It has not changed since Lugia first appeared in Gold and Silver, and Scarlet and Violet give the same numbers. There are no forms or size variants with a different official weight.
The Pokédex calls it the Diving Pokémon and says it lives deep under the sea because its power is too much for the world above. Ruby and Sapphire say that a light flutter of its wings can “blow apart regular houses”, and Diamond and Pearl say one flap is said to cause a 40-day storm.
Light for its size
At 5.2 m, Lugia is one of the taller Pokémon, but its weight is modest. Dragonite is 2.2 m and weighs 210 kg, and Snorlax is 2.1 m and weighs 460 kg, more than twice Lugia. Kyogre, the other great legendary of the sea, is 4.5 m and 352 kg.
Its rival Ho-Oh is shorter at 3.8 m and lighter at 199 kg, so Lugia is 17 kg heavier. Rayquaza is lighter still for its size: 7.0 m long and only 206.5 kg.
What its weight does in battle
Low Kick and Grass Knot hit harder the heavier the target is, and reach their maximum power of 120 against anything over 200 kg. Lugia, at 216 kg, takes the full-power version. Ho-Oh, at 199 kg, falls just below the line and takes 100.
The same 200 kg line decides Sky Drop, which only works on targets lighter than 200 kg. Lugia could learn Sky Drop by TM in Generations 5 to 7 and use it on Ho-Oh, but Ho-Oh could never lift Lugia with it.
Heavy Slam and Heat Crash depend on how much the user outweighs the target. For 120 power against Lugia, the user would need to weigh over 1,080 kg, more than any Pokémon’s listed weight. Celesteela at 999.9 kg gets 100, Snorlax gets 60. In HeartGold and SoulSilver its weight helps catch it: the Heavy Ball adds 20 to the catch rate of anything over 451.1 lb, and Lugia’s base catch rate is only 3.
Shadow Lugia and the films
In Pokémon XD: Gale of Darkness, the opening scene shows Shadow Lugia lifting the cargo ship S.S. Libra into the air. It cannot carry the ship back to Cipher’s base, which the villains treat as a flaw to fix. No separate weight is given for Shadow Lugia.
Lugia was designed for Pokémon the Movie 2000 by screenwriter Takeshi Shudō, who did not expect it to appear in Gold and Silver. The anime later featured a baby Lugia named Silver, but no official size or weight exists for a young Lugia.