This is something I have been thinking about for a long time. On some of the toy boxes, cartoons, and other media Unicron is referred to as the most powerful Transformer, excluding Primus. The problem I have with this is that in all the stories Unicron existed before Primus or the Quintesson's created the Transformers and since neither created Unicron he technically is not a Transformer. At best in the episode "Call of the Primitives" when the Oracle is explaining Unicron's origin it shows the Oracle as the Matrix, and given the link between the Matrix and Vector Sigma it is possible that one of the three gave Unicron a spark but that would make Unicron at best a half-brother to the Transformers. All G1 cartoon Transformers got their sparks from Vector Sigma except the Dinobots, who could have got their sparks from Personality Chips, the early explanation of a Transformers life force used in the episode "Starscream' Brigade", the Technobots, Scorponok, and Fortress Maximus. What I want to know is what everyone else thinks.