>>26651470Only because gorebyss and huntail had shells prior to evolving.
The only other one I think you could be talking about is Barbaracle, who actually is covered in shells do to barnacles using rocks as homes.
>>26651394Turtles have long necks, shells covering their underbelly and no spikes
Ankylosaura have short necks, a top-covering half-shell, and spikes everywhere
Torterra has a short neck, a top-covering half-shell, and spikes everywhere.
This isn't new either.
Charizard went from a lizard to a dragon
Meganium went from a fruit to a flower
Sceptile gains Dinosaur features
Samurott went from an otter to a sea lion
Snivy looses its limbs when evolving
Chesnaught goes from a mammalian chestnut to what appears to be a prehistoric armadillo
Drastic transformations happen every generation