Invisible Character Blocks

Love Construct 2! I was reading the tutorial and the general rule of thumb is to place an opaque block the size of the character to assign all the behaviors to. It showed a great example of this in the tutorial but what if my Main character starts out small and then gets bigger. Lets use Mario as an example. He start out small in the beginning. So I make a "Player Box" 16x16 to represent the size of small mario. Then when he gets a one up he grows to 16x32. Do I have to create all my behaviors for a small mario and a large mario and have two different size "player boxes"? Or is there a way for it that player box to change like an animation?

Thanks

You can set the size in the event sheet.

So in the event mario changes to big mario - set playerbox size width :16 - height: 32