The Charmeleon smacks you against his stomach, and lies down. He releases you, and you try to stand up on the unstable terrain of Charmeleon's scaly stomach. You see the Pokémon looking at you with a smile, he is laughing at your puny attempts. You slip and fall to the front, and bounce. "Why don't you stay there? It isn't like anything will happen to you!" the Charmeleon says happily.
You sigh and obey, you just wanted some time to get used to the situation. You lay on Charmeleon's belly, and listen for a while to his internal sounds. It is kind of relaxing, but it has something ominous. After all, he had made you believe he was going to eat you, and you still hadn't forgiven him.
Soon you stand again, and note that Charmeleon had noted you had moved and he is looking at you again. "Well, little one! I hadn't actually noted how small you are! Why don't you spend some quality time with me? It isn't like you'll survive very long at this size." You think about that, and realize that he is actually right. You nod, eager to get protected.
The Charmeleon grabs you and starts to walk until he arrives to a cave, clearly his home. He enters the cave until he is deep enough and his flame is the only source of light. He leaves you on the floor, and lays on the floor on his belly, looking at you all the time. "Why don't we do something? Anything so you get comfortable." You open your mouth to reply, but Charmeleon interrupts you before you are able to mutter a word. "I know! Let's play a game I just thought".
You look at him quizzically. "Basically, I eat you and you try to get out. You have twenty-four hours to get out of my body in any way you want, and if you aren't able to find an exit soon, I win. If you win, you choose the next thing we can do". You feel the need to object, but Charmeleon once again doesn't let you say anything. "And don't worry, there will be no digestion. You'll be completely safe, and I'm sure you'll have fun!"
He grabs you and lifts you from the floor, until he has you in front of his snout. From your point of view, the lift was just to show you how big he was. And you're impressed! He definitely was humongous. If he ate you, you knew that it would actually take you some time before you exited his body, it doesn't matter what path you choose. "So, do you accept? Come on, it will be fun!"