Hm. Well. There are certain logistical challenges to this problem, aren't there? But Eruka's confident.

"The Carnival was built with much heavier guests than you in mind, I'm sure~" she sing-songs, planting her hands on his rump to push him innn.

"But if you're that worried about weight--" A puff of smoke, and yup, she's a frog, grinning at Gongenzaka. Never mind that Eruka soaking wet probably wouldn't make a difference either way and it might be even more awkward for Gon to be going into the ~Tunnel of Love~ with an amphibian.

(On the bright side, maybe that's less embarrassing than going in there with a girl.)