Block the toilet up and determine if a length nylon cord, or similar strength strong string, will flush through past the toy by dumping a pail of water in. You did keep one end in your hand didn't you?
Next tie a rag to the flushed through cord and pull the rag backward through dislodging the toy. If the cord rag combo is insufficient, a rope can be taken through being you have the string in place and tie a larger rag onto the rope until that little feller gives.
Remember that Clove Hitch knot? Works great to secure the rag.
Leave about a 3 ft. length of cord or rope tail so if it won't pull through it can be pulled back.