yes it can
It can learn Shadow Ball.
sorry to burst your bubble, but ariados can't learn shadow ball.
Actually, it does learn Shadow Ball. It learns it at level 33, or through TM.
yep
Yes it can.
Yes.
It can be if you teach it the right moves.
Yes that is a very good moveset in my opinion
Umbreon never learns Shadow Ball without a TM.
Lv.41
yes
It evolves into Beastyena using a Dusk Stone.