How do I make my foot do damage with r15 while doing an Animation?

Try doing this. Haven't tested this but it should work.

foot = game.Players.LocalPlayer.Character.RightFoot
player = game.Players.LocalPlayer
mouse = player:GetMouse()
enabled = true
kobe = false

function KeyD(key)
    if enabled then
        enabled = false
    key = key:lower()
    local hotkey = script.bby
    local char = player.Character
    if key == hotkey.Value then
        local roundhouseright = Instance.new("Animation")
        roundhouseright.AnimationId = "http://www.roblox.com/Asset?ID=884273622"
        local animtrak = char.Humanoid:LoadAnimation(roundhouseright)
        animtrak:Play()
        kobe = true
        if kobe == true then 
            script.Parent.Touched:connect(function(hit)
                local plr = hit.Parent:findFirstChild("Humanoid")
        if (plr ~= nil) then
                plr.Health = plr.Health - 5 -- Change the amount to change the damage.
        end
                    end

                end
            end)

        end
    end
    wait(.75)
        enabled = true
    end
end

mouse.KeyDown:connect(KeyD)

I think "Touched" has to be capital, and "Connect" works better capitalized (idk why they did this, they are asking for broken games)also try seeing how long the animation is( print numbers and round to how long you think it is or stop it at a certain point, or check anim editor) and do:

kobe = true
local animtime = 5 -- animation time length
if kobe == true then
    script.Parent.Touched:Connect(function(hit)
    for i = 1, animtime, .1 do
        if hit.Parent:FindFirstChild("Humanoid") ~= nil then --if you hit a body part
            hit.Parent.Humanoid.Health = hit.Parent.Humanoid.Health - 20 --Replace 20 with the damage
         elseif hit.Parent.Parent:FindFirstChild("Humanoid") ~= nil then --if you hit an accessory's or tool's handle
            hit.Parent.Parent.Humanoid.Health = hit.Parent.Parent.Humanoid.Health - 20 --   Replace 20 with the damage again
        end
    wait(.1) --prevents crash, checks every .1 second
end

This may not work, and if it doesnt, try this :

local animtime = 5 --change to time of animation
    repeat if hit.Parent:FindFirstChild("Humanoid") ~= nil then
            hit.Parent.Humanoid.Health = hit.Parent.Humanoid.Health - 20
         elseif hit.Parent.Parent:FindFirstChild("Humanoid") ~= nil then
            hit.Parent.Parent.Humanoid.Health = hit.Parent.Parent.Humanoid.Health - 20
        end until i == animtime--yes this is one line technically,  it is up if you want to consolidate it but it is not needed, personally I think it is more organized this way.

Now if that doesn't work, message me and I'll try to help you more.

~~CamScripted, don't complain over spilled milk, spilled milk on a computer, or spilled milk in a new car. Evaluate and fix it. There is always something worse.