@Rendulshawahlol,
3 across is dobby
5 across is Karkaroff
7 across is Xenophilius
9 across is owls
11 is the one i cant remeber try a bunch of stuff
12 across is nagini
14 across is patronum
16 across is erised
1 down is umbridge
3 down is flamel
5 down is aberforth
8 down is percy
the top 11 down is basilisk
the bottom 11 down is Horcrux
14 down is Sectumsempra
18 down is riddle