Dipper wasn't fazed by the designs. That didn't mean anything concrete to him. So long as someone was caught with their pants or skirt down in them he knew he could convince her. He had to try at least.

"RAAGH!" Dipper rushed right at Mabel and tackled her to the ground, rolling about over top of her.

Dipper forgot one thing though, every male had one crippling weakness. "Sneak attack!" Mable yells kneeing her brother in the crotch, not enough to really hurt him but definitely enough to incompasitate him for a bit

Dipper winced in pain when Mabel went for the cheap shot! He gasped and wheezed out before grabbing himself and hitting the dirt. "Y-You...!" He snarled and removed one hand to latch onto Mabel's skirt so that she wouldn't move about too much.

"Let's get you in your diaper." Mable snickers as she easily gets out of Dipper's grasp and in no time flat has him wearing both the pull-ups and nothing else

Dipper wasn't about to just let it end that easily of course. When Mabel had managed to undress his lower end and got the pull-up on him, he lurched up with both hands this time and grappled around her neck!

"Not gonna let up here!" Dipper grinned. He was in the pull-ups sure but that didn't mean he couldn't still get out before Wendy saw! With his foot, his pull down on Mabel's skirt while holding her in that grasp.

Mable smiles, "Help Wendy!"She quickly puts Dipper into a bear hug to make sure he couldn't run

"STOP IT!" Dipper screams back at her. "You're crazy if you think you're gonna win with just one kick to the crooooOOWWW!" Dipper feels the pain course through him due to the bear hug. He flails his arms about, thinking it probably being a bad idea that he let Mabel get in on him so well.

Even worse, he heard Wendy coming their way!

This would have to be the quickest Sibling match they've ever had! That sucked when it counted so much! He wished he had put up a more impressive fight like last time instead of jumping to the conclusion so quickly.

Dipper found himself going red from pain and embarrassment as he wiggled about, seeing no other alternative.

"W-wait! C-Come on Mabel! Don't do this!" Dipper pleaded.

"To late." Mable laughs pointing at Wendy.........except she didn't really look like she was gonna laugh at Dipper. It almost looked like she thought he looked........cute

Dipper blushed bright red and pushed Mabel away from him before facing Wendy.

"No! W-Wendy! It's not! It isn't...! I don't wear...! M-Mabel! She tricked me and I-" Dipper was tearing up and blubbering now.

Wendy looked him over and giggled a bit. "... Dip... Calm down." She bent down and put a hand to his head. "You look cute."

Dipper's eyes were leaking and his nose dripped a bit before he sniffed it up. "R-Really?"

"Yeah...actually..." Wendy said back, looking him over.

"Oh come on!" Mable thinks to herself, she was expecting Wendy to laugh not coo over Dipper