Bowser turned to Peach for help. "Please use your Wish Power to save Kamek! You better, or else! I'm begging you, I'll do-" Peach cut him off, calmly replying, "I would have tried to anyways, but I can only make it so ONE person is in there at a time, so there's a 50-50 chance I rescue your friend." Annoyed by a common misconception Peach had fallen for, he replied, "Sweetie, he's my minion, not my friend."
Peach made her wish, and Bowser prayed to see Kamek, but only saw Mario. Peach was shouting with glee, and Mario was jumping up and down, so only Bowser heard a faint cry call, "Help! Your Chubbiness! Princess Peach! Anyone!" Then, Bowser saw the first star of the night. He made a wish, and disappeared.
Meanwhile, Kamek was frozen solid. The crash was a major one, and he was stuck in a running position forever. Then, he saw Bowser form. With all his wisdom, Kamek knew the sacrifice Bowser had just made. As he faded back into Bowser Castle, he mouthed his thanks to Bowser. He could tell Bowser was thanking him, too.