Não testei 
 
local monsters = {
    [1] = {monsterName = "Charizard" monsterPos = {x = 123, y = 321, z = 7}},
    [2] = {monsterName = "Venusaur" monsterPos = {x = 312, y = 542, z = 7}},
}
 
function onSay(cid, words, param, channel)
    for _, monstersInfo in pairs(monsters) do
 
        doCreateMonster(monstersInfo.monsterName, monstersInfo.monsterPos)
    end
    return true
end