>>515338871) Have NPC's who mention it happening to them
>I was training my slowpoke and my shellder, when all of a sudden they evolved! For a second I thought shellder vanished, but then I realised the two of them had come together as slowbro! Cool huh? I wonder if there's a way to make them separate again…2) Have an item that causes them to separate (could either be a one use or alternatively could be a held item with a battle effect, and the slowpoke/shellder split as a unique bonus)
3)Prior to the evolution, have a text box prompt and warn the player
>It looks like shellder is biting on to slowpokes tail, it doesn't look painful, but it looks like they're fusing together! Do you want to stop them or see what happen?Any combination of the above options would posit ample handholding to avoid the rare instance in which a kid unwittingly loses their precious shellder. There could even be additional benefits to the devolution item like the shellder and slowpoke learning new moves when they split.