According to Bulbapedia.It should be noted that several glitch Pokémon from Generation I, such as Missingno., far exceed normal weight measurements. For example, the heaviest real Pokémon, Groudon, weighs in at 2094.4 lbs (950 kg), while Missingno. weighs 3507.2 lbs (1590.8 kg), and h POKé weighs an astounding 6099.0 lbs (2766.5 kg).