Speaking of the Golett line, some of you may already be aware that Golett and Golurk are based on a magical entities known as a golem. A golem in legend is a figure molded from clay. It has characteristics of a giant. It can be made to move through the use of magic, but usually displays little consciousness. It will battle or carry out whatever task the person who controls the golem bids.
The name Golett is a word play on golem. This line of pokemon resembles depictions of golem in art. Its typing of ghost and ground really makes sense, ghost for the supernatural aspects of the golem and ground for the mud and clay used to construct it. Golurk is also a bulky Pokemon with high attack but slow speed and can have the ability klutz. I would imagine that this line is made that way because golem can be towering and powerful, but also sometimes described as slow, unformed and awkward when they move through our world.
That is not all though. There is a very specific legend known as the golem of Prague that the Golett line has made an allusion to, the strap across the pokemon's chest is associated with this golem in art. This is a story about a 16th century rabbi who called upon the powers a golem to defend the people of the city from oppression from the emperor.
Here are some links that speak about this in much more detail than I ever could.
https://m.youtube.com/watch?v=2l7od_NRtUI
Explanation about Golurk begins at 2:00 but I think its worth watching the whole video myself. Same goes for the link below, but it begins at 4:25
https://m.youtube.com/watch?v=01T4JGEU1ng