Iron on / printed shirts.

So I have a white shirt on the way and I am looking at my options to have a Mario 1up logo put on it. Has anyone done any iron on or printing on shirts? Should I worry about it staining through? In the end it won't be that big of a deal to put some fabric behind the logo.

I've used inkjet printer iron-on sheets for cosplay a few times. I think it should be fine, as the decal stays on the outer surface of the shirt and won't directly touch the doll's body. However, I'd recommend keeping the shirt is in a cool place. I've had issues where the decal softened a bit on very hot summer days. Wouldn't want that to get stuck to her arm or something.