Pokevirus Growth (Patreon)

"A pokerus affecting sizes has spread about, affecting many Pokémon throughout the regions. Making them bigger, stronger and voluptuous. Ethan was supposed to go along with Lyra onto the St. Anne to meet new trainers, battle, and bond more with her. Celebi on the other hand has other plans. Because of her growing body getting bigger and bigger, she's unable to stay in a pokeball for long before it bursts. The St. Anne doesn't allow straggling Pokemon, but she intends on going, even if she were to damage the ship. She is a growing girl after all."