can i catch ludicolo in the pokemon games?
One does not simply catch Ludicolo.
You have to evolve a Lombre in order to get it.
You must use a Water Stone in order to evolve Lombre.
Locations for Lombre are here: http://pokemondb.net/pokedex/lombre#dex-locations
You can also get Lombre by evolving it from Lotad, which is located here: http://pokemondb.net/pokedex/lotad#dex-locations