My encounter.lua file

-- A basic encounter script skeleton you can copy and modify for your own creations.

-- music = "shine_on_you_crazy_diamond" --Always OGG. Extension is added automatically. Remove the first two lines for custom music.
encountertext = "Toriel is here to stop you!" --Modify as necessary. It will only be read out in the action select screen.
nextwaves = {"bullettest_touhou"}
wavetimer = 4.0
arenasize = {155, 130}

enemies = {
"Toriel"
}

enemypositions = {
{0, 0}
}

-- A custom list with attacks to choose from. Actual selection happens in EnemyDialogueEnding(). Put here in case you want to use it.
possible_attacks = {"bullettest_bouncy", "bullettest_chaserorb", "bullettest_touhou"}

function EncounterStarting()
    -- If you want to change the game state immediately, this is the place.
    battle_progress = 0
    enemies[1].setVar("currentdialogue", {"[color:fca600][effect:shake]For the sake of a\n better ending\n I must\n\n\nDEFEAT YOU"})
    State("ENEMYDIALOGUE")
    Player.lv = 10
    Player.hp = 56
    Audio.LoadFile("toriel_theme")
end

function EnemyDialogueStarting()
    if battle_progress == 0 then
        currentdialogue, ("After all you've \ndone, you want \nme to\n stand aside? \nAll I've got to\n say is \n[effect:shake][color:fca600]HECK NO!.")
    elseif battle_progress == 1 then
        currentdialogue, ("[color:fca600][effect:shake]For the sake of \na better ending\n I must\n[color:ff0000]DEFEAT YOU")
    else
        currentdialogue, ("[color:fca600]I can't give up...")

    end-- Good location for setting monster dialogue depending on how the battle is going.
end

function EnemyDialogueEnding()
    -- Good location to fill the 'nextwaves' table with the attacks you want to have simultaneously.
    -- This example line below takes a random attack from 'possible_attacks'.
    nextwaves = { possible_attacks[math.random(#possible_attacks)] }
end

function DefenseEnding() --This built-in function fires after the defense round ends.
    encountertext = RandomEncounterText() --This built-in function gets a random encounter text from a random enemy.
end

function HandleSpare()
    BattleDialog("[color:ff0000]NO SPARING =)")
end

function HandleItem(ItemID)
    BattleDialog({"You ate the " .. ItemID .. "."})
    Player.heal(15)
end