Leave it to PET!

Leave it to PET! (まかせてPETくん, Makasete PET Kun) is a children's comedy manga series written and illustrated by Kenji Sonishi (そにしけんじ). The series was published by Poplar Publishing Co. Ltd. in Japan and licensed by Viz Media in North America.

Plot
Nine year old Noboru Yamada recycles a can- the next day, the can returns as a robot! The canned-robot's name is PET, and is programmed to help Noboru through his daily life, though PET usually makes his problems worse.