Once the pills were taken, both Janet and Tigra held their churning stomachs.
"It's best to not hold those in," Susan said, Jennifer agreeing with a laugh.
"BURRP!"
"BURRRRAP!"
Both Janet and Tigra blushed as their bellies expanded into guts.
"BURRRRRRRP!"
"BIRRRRAAAAAAAAAAAAAAAP!"
Next their butts increased, becoming much larger.
"BUURRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRP!"
"BURRRRAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAP!"
These final belches piled on the weight and height, both superheroines now sumo-sized and weighing as much as Sue did.
Tigra ran a hand over her expansive furry form and grinned a bit at the warmth she felt, purring as she did so.
Janet felt her wide bottom and blushed a bit.
"I like this," she admitted.
"Me too," Tigra put in.
Janet shifted her size to that of a pixie and found herself even fatter in this form but she was still able to fly around as fast as she always could. Janet felt something else as well, something she could project. Instinctively focusing her mind, she extended her hand and a stream of pollen went out. Nothing happened to the floor the pollen touched but Janet flew around some more until she was in front of the mass that was Susan's rubbery right butt cheek. Focusing her new power, the pollen struck Susan's butt.
Susan jerked up a bit at the feeling of something on her butt.
"Janet, what did you-" but Susan was cut off as she felt her rubbery, elastic butt, start to sag and fill with fat! In fact, her butt was now twice as wide as before and felt heavy. "You...can change the molecules in a persons body to fat with that pollen. Incredible!" Susan then changed into her human sumo form and marveled at how much more she weighed.
Turning back to her rubber body, Susan beamed at Janet, who returned to normal human size, or sumo size as the case may be.
"What can you do Tigra?"
"I don't know, let's find out." Figuring it had something to do with changing forms, an image of a fat tiger came into Tigra's head.
Her body transformed and Tigra noticed that Janet, Susan, and Jennifer were larger than before. In fact the whole room was!
"Aw, how cute!" Jennifer said, picking up Tigra and taking her over to a mirror.
Tigra's feline eyes widened as she looked at her reflection. She was a fat kitten!
"Is that me?"
"Looks like you're a real fat cat now," Jennifer said, petting Tigra's furry head. The flabby cat purred loudly then and was about to speak once more when she felt a hairball in the back of her mouth. Hacking an coughing, she spat one out, the ball hitting Jennifer in stomach.
Jennifer's stomach expanded then, stretching out her uniform even more.
Tigra thought of her normal form and returned to human size.
"Looks like Janet and I can make people fat. Not as useful as both of your powers but handy at ruining the plans of a villain."
Susan nodded and both Jan and Tigra hugged each other in excitement, enjoying their flabby bellies pressing together.
"We're the Sumo Four!" Susan proclaimed, causing Jen, Jan, and Tigra to laugh. "Well it's not the best name but I'd like to see you three come up with a better one!"