[Scripting Question] How to change backsprite size

[pauloalex4091]

Hi everyone out there. I´d like to change the backsprite size in pokemon essentials. I´ve already found this in PokeBattle_Scene

if @frame>5 && @PokemonBattlerSprite.zoom_x<1.0
     @PokemonBattlerSprite.zoom_x+=0.1
     @PokemonBattlerSprite.zoom_y+=0.1
     @PokemonBattlerSprite.zoom_x=1.0 if @PokemonBattlerSprite.zoom_x > 1.0
     @PokemonBattlerSprite.zoom_y=1.0 if @PokemonBattlerSprite.zoom_y > 1.0
     pbSpriteSetCenter(@PokemonBattlerSprite,@spritex,0)
     @PokemonBattlerSprite.y=@spritey+(@endspritey-@spritey)*@PokemonBattlerSprite.zoom_y
   end
   if @PokemonBattlerSprite.tone.gray<=0 && @PokemonBattlerSprite.zoom_x>=1.0
     @animdone=true
   end

I think I have to change all 1.0 values to what I wanted and I did it. It won´t work at all because it´s true that the backsprite in battle has changed size but when I attack it goes to the default size

If there is anything I have to do in addition to this I´d appreciate any help.