I've go the platinum in Spyro 1 today.
It was very easy, on the same level like TfB Skylander Games. I would compare it in difficult with the Skylanders Imaginators platinum.
To find all gears in Twilight Harbor (It is a silver trophy) was a little bit difficult because some of them are really good hidden in the level. I've made an screenshot of the best hidden gear in that level, so if someone can't find it I have a picture where it is! xD