No, traditionally wyrm is the spelling of the classic western dragon while wurm is traditionally the spelling for it when use on the serpent dragon with has no limbs at all. Of course sometimes wurm is use for a land dragon with no limbs and serpent is use as serpent is use for a sea one. Sense Spike is an eastern dragon in this and three toes on his feet and four fingers he is either a ryu(three toes) or a yung (four toes). It is a great drawing of Spike as an eastern dragon by the way