Sidescroll Ladder Script

You'd do it this way:

global script Slot_2{
   void run(){
       while(true){
      //call the ladder function
         ladder(98);
          Waitframe();
        }
     }
 }

you can also change the variable 98 to any other flag number of your choice. you can only use flags 98 - 102 for now though.

Doing the work for you:

import "std.zh"
//global variables go here
bool has_hover = false;
bool on_ladder = false;
global script onstart {
  void run() {
   
    //one time things go here
   
    while(true) {
     
      //function calls go here
      ladder(98);
     
      Waitframe();
    }
  }
 
  //functions go here
  //Courtesy of Saffith/beefster09
  bool isSolid(int x, int y) {
   
    if(x<0 || x>255 || y<0 || y>175) return false;
    int mask=1111b;
     
    if(x % 16 < 8)
      mask &= 0011b;
    else
      mask &= 1100b;
   
    if(y % 16 < 8)
      mask &= 0101b;
    else
      mask &= 1010b;
   
    int ret = Screen->ComboS[ComboAt(x, y)] & mask;
    return (ret!=0);
 
  }
 
  void ladder(int f) {
    int lc;
   
    lc = ComboAt(Link->X+8, Link->Y+15); //for speed
   
    if(Screen->ComboF[lc] == f || Screen->ComboI[lc] == f) {
      if(!on_ladder) {
        on_ladder = true;
        has_hover = Link->Item[I_HOVERBOOTS];
        Link->Item[I_HOVERBOOTS] = false;
      }
      Link->Jump = 0;
      Link->Z = 0;
      Link->Dir = DIR_UP;
     
      if(Link->InputDown) {
        Link->InputDown = false;
        Link->Action = LA_WALKING;
        if(!isSolid(Link->X, Link->Y + 16)) Link->Y += 1;
      }
      if(Link->InputUp) {
        Link->InputUp = false;
        Link->Action = LA_WALKING;
        if(!isSolid(Link->X, Link->Y - 1)) Link->Y -= 1;
      }
      if(Link->InputLeft) {
        Link->InputLeft = false;
        Link->Action = LA_WALKING;
        if(!isSolid(Link->X - 1 , Link->Y)) Link->X -= 1;
      }
      if(Link->InputRight) {
        Link->InputRight = false;
        Link->Action = LA_WALKING;
        if(!isSolid(Link->X + 16, Link->Y)) Link->X += 1;
      }
    } else {
      if(on_ladder) {
        Link->Item[I_HOVERBOOTS] = has_hover;
        on_ladder = false;
      }
    }
  }
}