These cute Mario bomb and Tanooki rugs are by Etsy seller
Harmonden, who specialises in video game decor. She has loads more Mario rugs to choose from so have a look at her page and see what she has in stock.
This cute 1UP Mario mushroom rug from Etsy seller
GrannysFanny is crocheted with individual squares to give it that pixel effect. Have a look at her Etsy shop to see what crochet rugs she has in stock at the moment.
Technically this is an antislip doormat but it would look great in a Mario themed bedroom. The green stripes resemble the nicely mowed lawn that you often find in Super Mario 3D World. At only £4.50 from Ikea this is a brilliant way to add a splash of colour. You could even put a few in a row and it would be just like hopping between mario islands.
You could also go for a simple grass effect shaggy rug.