Rodman's Clauncher is
Rodman's main partner. Udeppou is not very friendly.
Rodman originally planned to have it entertain the guests at the aquarium but
Rodman's Clauncher seems to hate being watched by people. It lost its appetite and in the twinkling of an eye, became lethargic, so
Rodman decided to made it his Pokémon.
When Rocket Gang tried to steal
Clemont's Dedenne, it fought to save it. It may not be a friendly Pokémon, but it has a strong sense of justice.