Chapter 413 - 412: Slowking!
In truth, Slowpoke's decision didn't surprise Cain.
In a place and situation like this, choosing to evolve into Slowking was undoubtedly the best option.
Moreover, after the massive increase in Slowpoke's psychic powers, Slowking was the evolution that suited him best.
If Cain had to choose, he likely would have had Slowpoke evolve into Slowking.
Although Slowbro could mega evolve, Cain had yet to find a single Mega Evolution stone.
Besides, Cain already had quite a few Pokémon capable of mega evolving:
Blaziken, the final form of Torchic; Aggron, the final form of Aron; and Gengar, the final form of Haunter.
All of them were Pokémon capable of mega evolution.
Compared to Slowbro's mega evolution, Cain thought the mega evolution of these three Pokémon offered better cost-effectiveness.
Of course, the Mega Evolution stone was the deciding factor. The choice of which Pokémon to mega evolve didn't rest entirely with Cain.
Nodding, Cain retrieved the King's Rock he had obtained from Umbra from his storage space.