This is pretty much a plug & play script that will allow you to change the dash animation of the whole party. You must have an extra character spritesheet and name it something like "original_sheet1_dash.png", being "original_sheet1" the actual filename of the original actor spriteset. Then the script will switch from one to another in no time depending on the Dash button and any arrow key or its equivalent.
The Omega Orca Edition Basically, the only new feature it includes is that it lets you add 1 or more horizontal frames to a given character's spritesheet, and adds the new pattern_max variable so it never skips any of the extra frames while updating the animation.
Now it also affects all window classes by overwriting the draw_character method.
Spoiler Ruby: