Hey, lasse, how have you been?
Well, dear, Tulpas are a part of Slavic traditions (if i'm not wrong) and can have any shape, form or behaviour one would like. You could call it a Homunculus, if pleases.
I don't have many details about the process to create tulpas, but has something to do with lots of concentration, intent, visualization and sheer luck. You can create a tulpa that looks like almost anything (please don't ask me about tulpas in a draconic shape, I really don't know and i'm not an expert) but they tend to be violent and nigh-impossible to control, and carry a loath so great of their own existence that will murder the one who created them in the first oportunity.
And no, by haven's sake. Tulpas are not spiritual guides, in any form. They could be described better as a Homunculus that got sentient and perceptive and soon learn that itself does not exist for no matter how real they are, therefore leading to a violent and murderous behaviour.
Hope it had been useful.
May the Storm guard you.