The final boss can be hard if you forget that each of your three transformations has a special power... if you remember this you should find Orgus really easy. Basically all you have to do is to kill the purple rock monster first so that you get all the crystal you need to do your special (50). Then, when you have 2 or 3 specials, go throw one in the face of Orgus. You can throw the special you want; if the the protection aura is blue you have to do the yeti special, if it's red the squirrel special, and green the armadillo special. Also, when you transform Tork to do your special you will never be the right color so you have to beat a rock monster that as the color you need. It wont be easy. Avoid the attack, transform to the right color and do your special. You to do this around 4 or 5 times and your done with this game.
Statues
When there is a statue that is brown and white, get all the good statues first, then hit it. It will change the bad statues to good. If there is an exploding statue, it will turn into an extra life.