One-frames

Description
One-frames refers to inputing an action in the first frame after a hitstun animation has finished.

When any chracter takes damage, a hit-stun animation will overide said character and prevent them from inputing any actions, but one-frame after the hitstun animation, the game has not yet updated the status of the character, and for a single frame the game will register the character as on the ground, allowing the character to use any of their abilities that they'd normally only be able to do on the ground. (Except cruise bubble)

It comes into use, when you use momentum from taking damage, and being in the air during the hitstun animation, to be able to gain extra height or distance by inputing a jump, since the game thought you were on the groud during that frame, you'll be able to input a second "double" jump at your own leisure.

For spongebob, during this frame you can use Bubble-bowl or Bubble bash instead of a jump, with Bubble bash giving you more initial hieght, and if you are going a far enough distance you could get a double jump in as well. Bubble-bowl off a one-frame provides no useful tech, as it is just what you'd expect activating bubble bowl in the air.

You'd use a bubble bash during the one frame, if you are either attempting to reach a high location, or go very far. You'd use a jump if you want to have more control of where you land and you aren't limited by the animation of the bash.