The bodysuit Applejack is wearing has a unique superpower: body morphing. It can morph her body into a couple of versions: obese and muscular.
When her body is morphed into an obese version, she has these superpowers:
Supernatural burp/belch: This superpower allows her to burp/belch mainly to hurt someone's ears, but it can also be temporary. It can be heard about the same amount of miles as the lion's roar.
Supernatural stomp: This superpower allows her to stomp onto the ground to cause an earthquake.
Belly bounce: This superpower allows her to use her big belly as a rubbery shield to bounce off anything that's being thrown at her.
When her body is morphed into a muscular version, she only has supernatural strength durability. Just like her geode, she can pick up any heavy thing that's impossible for an average person to carry, but the durability is up to her.
She controls her superpowers when wearing the body morphing bodysuit, but it's harder than she realizes. It sometimes has the mind of its own, which it rarely happens.