Notes:

Fun fact: Slowbro's design stayed the same since conception, all the way back when it was still Capsule Monsters. It is the 8th Pokemon added into the game. The only thing that changed was its Japanese name, from Yadon to Yadoran. Yadon was given to Slowpoke, who was the 37th Pokemon added into the game. Perhaps this is why Slowpoke evolves at Level 37?