He turned and sprayed you with the water from his lapel flower and you instantly felt strange, and thought perhaps the clown attachment wasn't such a good idea.
Too late to do anything about it though as your body began to puff up, rounding out even more, but instead of fat, it was more like padding, as your body smoothed out, folds and cellulite disappearing. You looked down and saw that your body was becoming round like a ball!
You then felt your head pull down into your ball like body, leaving an indent, and your head swelled rounder, becoming just as ball like like as your body. Your hair swirled up and left a single large tuft of blue hair. You felt your legs and arms pull into your body about half way. Your arms stayed mostly normal, while your legs thickened at the thighs to match the round body. "Wheee!" You said, not meaning to.
Your face began to tingle as a round bulbous nose popped out on your round face, turning bright blue like your hair. Your lips curled into a grin as the turned red. White surrounded them and your eyes as the rest of your skin took on a pinkish hue.
Your feet began to throb and grow bursting your sneakers as they grew outwards. Then in one large motion, you shrank in size, smaller and smaller until you were about the same height of Weeble and Wobble. Your now baggy clothes swelled around you and morphed until it was a colorful pair of jean suspenders and nothing else. Barefoot, you wiggled your large toes and waddled around. It felt great, your mind reeling from the change, and you forgot most of who you were.
"Hiya, I'm Roly-Poly!" you giggled as you hugged Weeble. Wobble walked over and pulled you in for a kiss. "Welcome" he giggled.