waaaaghlord wrote:The Dinobots were only created on Earth in the G1 cartoons. Every comic continuity from Marvel through to IDW has had them existing prior to this and from Dreamwave onwards they have been known as Dynobots in their pre Earth forms.
To add to what waaaaghlord said, Even their toy stechspec bios refer to them having originated on Cybertron; particularly Snarl's bio. It specifically states that he hates the mode he was given when he came to Earth. here is the bio:
An unhappy loner of few words and fewer opinions. Finds joy only in battle. Hates his Dinobot form, longs to return to Cybertron. Large golden plates on spinal assembly are solar collectors... strength increases tenfold in sunlight. Tail can shatter 20 foot concrete cube. Armored hide resists most missiles. Vulnerable to nighttime attacks due to his weaker state. Slow... uncooperative nature hinders others from helping him.
As you can see from Snarl's bio, he was originally from Cybertron, and wishes to return. All of the Dinobots originally came from Cybertron. Also, according to the DW comics, the Dinobots came to Earth
after the Ark left. And had, in fact, come following the insecticons in search of the missing Autobots and Decepticons. This is explained in issue #8 of the ongoing series. They landed some time in the prehistoric past while the TransFormers on board the Ark were in stasis lock buried in the mountain side.