Team Rocket Hideout/Manga

Pokémon Adventures
The Rocket Hideout appeared in Tauros the Tyrant and The Jynx Jinx, where inflitrated it, disguised as a Team Rocket Grunt. Like in the games, the entrance to the hideout could be opened by pressing a switch behind a poster in the Rocket Game Corner. In the hideout, Red found a laboratory, where Team Rocket was creating from 's cells, intending it to be their ultimate weapon. Blaine was one of the working on the project. After the Pokémon was completed, it escaped, presumably destroying the hideout.