Weedle to Beedrill: Level 7, then level 10

Stages

Weedle starts a line of three stages, from Generation I

1. Weedle#0013bugpoison
2. Weedle to KakunaLevel 7
   Kakuna#0014bugpoison
3. Kakuna to BeedrillLevel 10
   Beedrill#0015bugpoison

How each step works

2 steps in the Weedle line, the same in every game that has them