We know a boggart can be destroyed by Riddikulus.
We also know that Boggarts can move as well.
"Boggarts like dark, enclosed spaces," said Professor Lupin. "Wardrobes, the gap beneath beds, the cupboards under sinks -- I've even met one that had lodged itself in a grandfather clock. This one moved in yesterday afternoon, and I asked the headmaster if the staff would leave it to give my third years some practice."
Do we have any info, canon or interviews, on how are boggarts created?
Per JKR's own writings, they appear to have arisen spontaneously, like a lot of other 'amortal' creatures and beings.
Like a poltergeist, a Boggart is not and never has been truly alive. It is one of the strange non-beings that populates the magical world, for which there is no equivalent in the Muggle realm. Boggarts can be made to disappear, but more Boggarts will inevitably arise to take their place. Like poltergeists and the more sinister Dementors, they seem to be generated and sustained by human emotions.
