Come to think of it, Tenryuu's right. They won't actually be using their legs while they're in battle, they'll be in their "ship form".

Knocks said:

Come to think of it, Tenryuu's right. They won't actually be using their legs while they're in battle, they'll be in their "ship form".

They already said that their ship form depends on their land form, so strengthening their legs should presumably up their nautical speed and fuel economy.