Body Switch is a force in the SML universe that lets two people switch bodies.
When the body switch is activated, both characters must either wish in bed that they want to switch bodies, in the next morning, the characters would have switched. The second way is for two characters to have a near death experience at the same time, then they will somehow switch bodies. They can use a method to do this, such as the lightning bolt hitting the Nintendo Switch's Joy-Cons, or two characters jamming a fork in an outlet.
|Episode||Who Switched Bodies?|
|Switching Bodies!||Bowser Junior, Chef Pee Pee|
|Life is Ruff!||Bowser Junior, Chompy|
|1 2 Switch Bodies!||Bowser Junior, Jeffy|
|Jeffy's Switcheroo!||Mario, Jeffy|
- Bowser Junior switches bodies with someone in all episodes featuring the body switch except for in Jeffys Switcharoo.