Single post in Pokémon Scarlet and Violet: Bonds Beyond Boundaries

"That's correct Esper, when a Shellder bites down on a Slowpoke's tail, the Slowpoke evolves into a Slowbro. And as you mentioned, Shellder's form also changes when it becomes part of Slowbro. But Pokemon are strange and mysterious creatures, and in my home region of Egho, there's a very unique method of evolving a Shellder." before taking out a Slowpoke Tail, "Now, some people consider it a bit unethical to consume a Slowpoke's tail, but it doesn't feel any pain, plus the tail grows back within a week." he took out a Poke Ball and released a Shellder that looked like the way Shellder looks like when it becomes part of Slowbro. "This regional variant of Sheller evolves from a Kantoian Shellder by giving it a Slowpoke Tail to bite down on. Unlike the Shellder that becomes part of Slowbro, this Shellder is its own individual, and it's a Water/Steel type."