Generate a vibrant and lively photographic poster-style image capturing the exuberance of SpongeBob SquarePants. Showcase the beloved character in an iconic pose, with his infectious smile and cheerful personality radiating from the image. Utilize a playful and vivid color palette reminiscent of Bikini Bottom's underwater world. Include key elements that reflect SpongeBob's jovial spirit, such as his square pants, pineapple house, or signature spatula. Employ dynamic lighting and composition to convey a sense of joy and whimsy. Craft an image suitable for a poster that celebrates the timeless appeal of SpongeBob SquarePants and brings a smile to fans of all ages.