While hiking throughout the ragged mountains of your region, eventually reaching a flat space to rest on, the ground shakes... before a massive shadow is cast over you. Looking up, you could see the huge Pokémon making the shadow was a gargantuan Charizard that roars into the sky before heavily stomping the ground and looking at you while licking his lips and growling audibly

I see a tiny little creature has entered my territory... oh, you poor thing, based on that reaction, I can tell I am a LOT bigger than what you expected~ Why are you here in my territory, hm?~