UK Burger king did a series of toys which were similar (but not quite) the same as some released in the US. McDonalds' also did a series. This is from Burger King, to celebrate the release of Sonic R on PC.

A Kids Meal Burger King assortment. (With back card) If you wind up the Knuckles, he punches his fists. The Sonic and Robo have magnets in them, so when you push the Sonic along, the Robotnick moves away. But what is that purple thing in the background? It's not a cluckoid. It looks like some kind of Proto-Scratch. (From AOSTH, remember?) No one is ever selling 'proto-scratch'. It is actually a target for the Knuckles wind up to knock down. The Tails is a 'pull back n' go' toy, and he came with a "grounder" like target which you don't see here. The larger Eggman one (from the top photo) can be filled with water and pressing the control pad shoots air through the water. This is from England Burger King. Info/Explanations by Ota.