You can also press Y and the bros. will both jump at the same time regardless of what action you have up.

So Chugga got some info incorrect about the action commands. L+R resets them to jump only in the remake. L resets them in the og. You can press L in the remake to go to the next action and R is backwards which is why he kept getting spin jump and drill instead of Hammers.

*my edit is funny
of course there is a typo...🤦‍♂️