[Kamek was immediately stricken with horror upon hearing the news of Wendy's apparent poisoning. Whoever started this twisted little game, come heaven or hell, he would strike them with an unmeasurable fury and make them wish they were never conceived. You do not threaten the Koopaling's lives, that was just totally not acceptable on Kamek's watch.
However, he had no time to go on a long winded mental rant. The Magikoopa immediately dashed outside and prepared to take off, intent on taking as much antidote as he could. But things turned for the worst. The broom, it wouldn't lift. Kamek tried revving the engine a little He tried teleporting. Nothing. No magical shapes or fire either. Kamek would question the cause of this, but, you know, he's been in the school long enough to know secondary complications typically occur in the midst of a plot event. Blast this school.
Still, when it came to the well-being of his not-family, there was no stopping the stubborn turtle. He'd go up to the clock tower. He go up to the clock tower as fast as those old legs could take him and take the antidote for himself. But it would not be easy, because Kamek was pretty certain that by this point in time everyone else was out to get it. Well, then. He'll have to fight for it. Maybe take a few lives along the way, whatever it takes. He may not come back with enough antidote for everyone (knowing Wendy, she'll probably down everything), but if that's the case, there'll be a shrine made in Lash's honor. And maybe for General Guy. No wait, definitely one for General Guy. Their shrines will be equal in size. They can't complain, anyways.
....however, it may have been more within Kamek's physical capabilities to create an antidote on his own. After ordering a few lackies to go after it in the clock tower just in case, Kamek set out to find food samples. From the fridge, plates, trash, ground, Kirby's mouth, everything from that day. Using the power of SCIENCE and some shortcuts with magic on the side, he set out to find what this poison was made of and create the appropriate cure.
He did not go any further than the extensive food testing.]
It's not poisoned.