The Wooly Mammoth was part of the Dino-Riders Ice Age line. It was a very large piece
that had motorized walking action, a feature that would later be removed when the
toy was re-released as part of the Smithsonian Institution line. The Wooly Mammoth
came with the Neanderthal, Grom. This doesn’t seem to be the same Grom character
that appeared in the Ice-Age Adventure cartoon episode because the character looked
a lot different and in the cartoon, he was actually a bad guy, so it really wouldn’t
make sense for him to be joining the Dino-Riders army.