Tari
Smash Apprentice
I believe its aerial release.. not sure if you can ground release Wario and he'll have the same lag or stun or whatever.I don't play many warios, but I was told that grab release running usmash is guaranteed.
thats all I got
Also, I too haven't played many Wario's I just know that he's got really great aerial mobility and you can't hit through his f-smash.