Pickled Pink(1965)

Out you go and take your caterpillar friend with you!

An alcoholic is returning home from a night of partying and encounters the homeless Pink Panther in a park. He invites the panther to come and stay with him, but he has a wife who disapproves of him bringing in any guests. So, he has to keep the Pink Panther hidden, which tends to be rather painful for the hapless panther.