From Zelda Legends Wiki
A huge marionette monster resembling Ganon. Attacks by stretching out its arms until its strings are cut. After that, it's possible to shoot Light Arrows to it's tail bulb. When Link thinks the battle is over, Puppet Ganon transforms into a huge Puppet Spider.
Puppet Spider attacks by spinning around at the top of the floor, and then falling to the ground and trying to hit Link. The tail is the weak point for the arrows, again.
The caterpillar, or snake form, is fast and it cruises around the room, making harder to hit the tail. When the tail is being hit 3 times, the puppet is defeated.