Grandpa Grumble(VMMM015) was born on the 6th of June 2004 in the Moomins. His mother was Grumpy and his father was Burgan, they were the dominant couple at the time.Grandpa Grumble was born with three other litter-mates called Misable(VMMF017), Mymble(VMMF016) and Toft(VMMM018). The whole litter survived to adulthood. Grandpa Grumble lived in the Moomins for three years. But in June 2007 he disappeared and was considered Last Seen. Three of Grandpa Grumble's littermates and his father also died or had disappeared by the end of the year. Eventually his mother Grumpy and last remaining littermate, Mymble, were also lost.