What Pokémon's Base Stat Total does not change when it evolves?

The answer is Scyther. When Scyther evolves into Scizor, its base stat total does not change. Both Scyther and Scizor have a base stat total of 500. This is quite unusual among Pokémon evolutions, as typically, a Pokémon's base stats increase upon evolving. However, Scyther breaks this trend, remaining unchanged in terms of overall stat potential when it evolves into Scizor.