((while in the forest with your seviper, some weird salesman gave you a strange evolution stone that seemingly wasn't restricted to a specific type... in a turn of plot convenience, your seviper ended up using the evolution stone, even though no seviper can use one... your seviper became human, or at least a lamia or naga since it still has its tail...)) your seviper starts speaking, not in a cute high-pitched pokémon voice, but instead in a deeper human voice — "sev- I CAN TALK NOW?!?"