Mecha Long Legs
Like a man-at legs with an iron coating. When it steps in water, electricity shoots from it's legs. And instead of a lazer, it grows an extra arm and throws a bomb at your pikmin. To beat it you throw an orange pikmin at bomb and it flies back at it and destoys the iron coating then, it acts like a man-at legs, and you beat it the same way too.
Forgotten factory secret floor 14.
while trying to beat mecha snagret, use white pikmin to find, and dig up a secret hole.