After searching for an hour and a half, both Misty and May gave up on finding Max.

"Well, he can't have left the city, he's too much of a wuss." reasoned May.
"Who was the last person to see him?" asked Misty
"Hmm, prolly Brock"

So in order to investigate the whereabouts of Max, May returns to her room with Misty, only to find Casey butt naked sporting an absolutely massive stomach. She seems to be asleep on Brocks bed, unconsciously stroking her stomach and muttering "Mmmm....Brock...I never knew..."