Rantanplan is a prison guard dog often tasked with watching over the Dalton brothers or assisting Lucky Luke track them down each time they escape. However, he is unable to understand this (or anything much) and mistakes Joe Dalton, who hates him psychotically, for a beloved owner. As well as stupid, Rantanplan is incredibly slow and accident-prone, and cannot even swim. However, he is very good natured, and will follow Lucky Luke to the ends of the Earth, one of the few people he recognizes on any persistant basis. Like Averell Dalton, he has a huge appetite and will devour anything that is put in front of him, whether it is food or not, which has ranged from bars of soap to dishwater.Source:Wikipedia

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