[park4bmx]

pawn Код:

if(sscanf(params,"iis", BuzCategory, BusPrice,BuzName)) return SendClientMessage(playerid,-1,"USAGE: /createbus <Category 1-5> <price> <Name>");

is iis becouse your want 1-5 , price ,name so that means that Category 1-5 is a variable so its an I
then same with the price and the Name is a Sting
you got them in the wrong order