>>22153957>>22153993>>22154005>>22154027This is the reason.
Carrabis beetles in real life rip snails from their shells to eat them. That's why when you trade Karrablast with Shelmet, the shell moves over. Fitting along with this, they made the beetle become slower and clunky due to the shell, and the snail, absent the weight holding it down, becomes a vengeful ninja with newfound speed and agility.
Obviously, a shell isn't literally the reason snails are slow, and slugs are just as slow, but the concept behind it makes sense and is actually pretty clever.
