Unlike girls outfit, boys outfit aren't that heavy... So it won't be much changeTwo meters with that type of outfit off the ground thats not bad I wonder if he takes the outfit off how much higher he'll go.
To be fair, Agnes' transformation only came about because of Kelly and Nazelbert. If she had married Yarata, she would still be under her family's thumb and wearing those unfashionable clothes. Though that probably would still be better for Yatata than his current situation.