Tobots are, by the way, not the only line of transforming robots made by YoungToys. There are also such toys (and cartoons, if that's something you're interested in) as GeoMecha (animal to robot to basic shape for storage; the combination ability is also there) and Metalions (most of them don't transform on their own, but still combine into different humanoid robots). Even Monkart has this element in a very unusual form - small monsters controlled by swords of their owners and manifesting transforming exosuits to participate in racing games (but the toys themselves are close to BotShots and Angry Birds Transformers in functionality and design).