"These robotic cat servants are loyal to their master. They're not designed for battle. But they aren't going to complain about it!"
BigMeows are only found in Fort Francis and only two of them are seen in the game. The two BigMeows each patrol two different rooms and it can be rather difficult to avoid them due to their large size.
They are also invincible to any damage but do not attack directly. However, Mario and the others can still be hurt by coming into contact with them.