I'm sure that something new will come up again, eventually.
I had a theory about it's possible origin before, but now I think it looks a lot more like this animation when you unlock the very final level in Land 2 :
It's the way he actually looks up just like in the Smash games that gets me, plus points if you are using the Game Boy pallet swap in battle.
I'm having a hard time believing they dug so deep to include some really obscure Wario Land references but then on the other hand they hardly had any obvious ones.
I mean... referencing a specific part of a special animation that you only see once in one game and only when you get to the secret final chapter.... and then they don't even have a Wario Land song? I mean what the heck?
Of course. I'm just saying that if it was true it would be very hard to believe.?
I wasn't saying that it is the definet origin of the move, I'm just saying that it just looks like it to me, after all I can't confirm it either way.
As Hex Scout pointed out in another thread you can unlock a Wario sticker in Metroid Prime 3, if you have a Smooth Moves save file on your system: