The Vikings are characters which first appeared in the Bump in the Night episode "I got needs". The Vikings resemble Big Mike from Baby Jail, but redesigned to look like Vikings.
There a 3 Vikings, 2 male and 1 female, they speak mostly in rhymes. They row around in a boat on land for transportation and they pillage and plunder, taking things that don't belong to them. They kidnap Squishington and Molly and take Molly's possessions.
The Vikings start taking Mr Bumpy's stuff, but Bumpy stops them by singing about he's "got needs." The Vikings are impressed by Mr Bumpy's greed and make him their new leader.