This Super Mario Bros. t-shirt shows a Goomba, Koopa Troopas, and a Super Star in the shape of a Christmas tree. Mario and Luigi are jumping to reach the star as snow falls in the background. The shirt reads Oh Koopa Tree Oh Koopa Tree. Goombas and Koopa Troopas were dangerous enemies that Mario and Luigi faced in the classic video game Super Mario Bros. Luckily for Mario and Luigi, if they found a Super Star, they would become temporarily invincible. This star helped Mario and Luigi to reach Bowser and rescue Princess Peach. Super Mario Bros. is one of the most popular video games of all time. Everyone will know you are a fan this holiday season when you wear this Oh Koopa Tree Super Mario Bros. Christmas T-Shirt!