Eh, 16, not too much of a kid.
You prolly have have less experience than me, so will you take some advice?
On some of your sets, they are not very good.
Your metagross shouldn't have psychic, it should have zen headbutt.
Your hitmonchan should have close combat
Your curslax should have body slam, earthquake, curse, and rest/elemental punch
And you should work on that strategy with ninjask:read up on him.
You have nice pokes, but you need strategy. I am more than glad to help you.