Walkthrough
After obtaining the Lift Key in the Rocket Hideout, you will be able to access the very last area on the final floor by using the elevator. This is were the Boss of Team Rocket can be found, the same you must defeat in order to obtain the Silph Scope and save Mr. Fuji from Pokemon Tower. However, directly before entering the room where said leader of Team Rocket can be found, you will be stopped by none other than Jessie & James. They will attempt to defeat you in battle in hopes of preventing you from proceeding.
Level 32 Arbok: Poison Jab, Glare, Crunch
Level 32 Weezing: Toxic, Sludge