Just tested

[20:40] <@Neo-Nemesis> !pokedex rayquaza
[20:40] <@Boris_III> [PokeDex 1.0]--[ Searching for RAYQUAZA in National PokeDex... ]
[20:40] <@Boris_III> [PokeDex 1.0]--[ RAYQUAZA No. 384 ]--[National]
[20:40] <@Boris_III> [Type: Flying, Dragon][Gender Ratio: Genderless/Genderless]
[20:40] <@Boris_III> [HP: 105][ATK: 150][DEF: 90]
[20:40] <@Boris_III> [SPD: 95][SP.ATK: 150][SP.DEF: 90]
[20:40] <@Boris_III> [Height: ERROR][Weight: 455.3 lbs (206.5 kg)]
[20:40] <@Boris_III> [Description: RAYQUAZA lived for hundreds of millions of years in the earth's ozone layer, never descending to the ground. This POKéMON appears to feed on water and particles in the atmosphere.]
[20:40] <@Boris_III> [More Info: http://pokemondb.net/pokedex/rayquaza ]

Make sure you do not have any conflicting scripts. I've also noticed that if you type all lower case letters it works better...

The Height ERROR requires work, working on that...