Although it's not specified what species the Little Critter is, but he resembles an -like creature.
Human Rights Watch says the incendiary weapons are 'among the cruellest' in modern warfare as they cause 'lifelong human suffering'.
Earlier, Kremlin spokesman Dmitry Peskov said Russia would only use nuclear weapons if its very existence was threatened.
Little Critter first appeared in the 1975 book Just for You.
The deputy head of Kyiv police, Oleksiy Biloshytskiy, said on Facebook: 'Another use of phosphorus ammunitions in Kramatorsk.
They usually included music, sound effects, and original songs too.