Well it only would be a little pedo for a year since Dipper's twelve. The following year he'll be thirteen and it won't be as pedo. Depending on whether he's still short compared to Wendy or not. Either way I'll bet Dipper will wait until he's closer to Wendy's height before telling her his feelings, even if it takes a few years. Then he'll go back to Gravity Falls and ask her out, even if he has to earn the money for the bus trip himself.
One person thought of 'Wendy's Dipping Sauce' as a couple name.
Okay yeah. Mostly normal fans might support cause Robbie is liek Wendy's age. And when I mean normal not to make any offevense to you. I mostly think that some fans will think of yuri, yaoi couples liek MabelXWendy and a whole bunch of others. Also thsi wasn't meant for you. I had a very nice friend. She was a nice person until she got banned cause she was harassing people but its seems not me. She supported mostly yuri couples but I'm very oaky with that. But also supported regualr couples. But mosty people critized her cause of a pedo couple.