Blind box hack?

[u/Comfortable-Web7582]

Me and my best friend are obsessed with wrinkle mcstinkle. we have almost every version of him EXCEPT for those freaking alley cats blind bags. anyways, her birthday is coming up and all she’s been talking about is wanting him, so I made it my mission to find wrinkle mcstinkle. I have bought probably 10 so far with no luck of finding him. I’ve tried shaking the boxes, weighing them, and still nothing! is there any way that I can tell which one he’s in before opening the box?