A timid, fearful, and cowardly Psymonster has ever met Sprout. Sprout is a wild, voracious, and temperamental Psymonster who is used to be the houseplant until the mentally ill, insane, and psychopathic Psymonster accidentally gave her too much of the experimental super-growth fertilizer, causing her to grow arms, tentacle-like vines, and one huge appetite. Lurking in gardens, bushes, and anywhere else in the Psymonster World that is green, Sprout bides her time and then springs out to swallow up any nutritious food with a gulp and a happy smack of her mouth. Oddly, she isn't actually carnivorous, and as long as she gets plenty of sunlight and regular watering, she just spits her victims out again after a day or two – smelling slightly of bitter food, and with a very inexplicable and mysterious story to tell.
She is a green venus flytrap with four eyes, a purple head, three blue flowers, tentacle-like vines, and a teal grass tongue.
- The name "Sprout" means a shoot of a plant.
- Sprout is one of the 44 Psymonsters who have no legs (the other 43 are Planto, Zoidburger, Gingersnap, Sundrift, Catfish, Colossus, Putty, Snakegrowth, Mystical, Waxcandle, Angler, Robotical, Sheloden, Kennywheel, Scary, Thunderquake, Cobracious, Creaturous, Greedy, Queasy, Transparent, Watermelody, Aquamarvelous, Trampedo, Waxcleaner, Oceanquake, Lunar, Snowmelter, Drivacuum, Slash, Stumpback, Elasmountain, Concordian, Conqueror, Puffy, Schizophobia, Tester, Mytherian, Booter, Telephone, Extraordinarium, Bargeria, and Coolberry).