If you think the only thing that the heart fruit does when you eat it is make you invincible temporarily, you are wrong. Here are some of the other things it can do:

1. It saves you a ton of eggs. If you pound the ground next to a fruit trapped in a bubble when you are invincible, the fruit will break open!

2. It makes your tongue much longer, helpful for getting enemies from a distance.

3. Lastly, if you pound the ground next to a shyguy while you are invincible, the shyguy will turn into fruit!