Shroomboom was most unfortunate to have been born in a pizza topping garden belonging to Kaos. Growing up among his fellow fungi, he knew it was only a matter of time before a late night craving would bring about their demise. So Shroomboom took a twig and a strand of spider web and made a slingshot. One by one, he launched all of his friends over the garden fence before flinging himself over to join them. Then he guided them all to the edge of the island and leapt to freedom, using his mushroom cap to catch a friendly breeze. Now as a member of the Skylanders, Shroomboom continues to perform courageous deeds... but he can be hard to find on pizza night.
Shroomboom - Metallic Green is a special painted variant of Shroomboom for Giants. He was first seen on the Skylanders Boomcast but since then no one has really found him in the wild. It seems like a few people have shown him off, but they claim to have been given the character by employees of Activision. Yet there have also been no stories that this is some kind of employee only character like Lightcore Prism Break - Gold, Fire Kraken - Gold, and Snowderdash.