红宝石The shell covering this POKéMON’s body is as hard as an iron slab. METAPOD does not move very much. It stays still because it is preparing its soft innards for evolution inside the hard shell.
水晶This is its pre- evolved form. At this stage, it can only harden, so it remains motionless to avoid attack.
银It prepares for evolution by har dening its shell as much as possi ble to protect its soft body.
金Inside the shell, it is soft and weak as it pre pares to evolve. It stays motion less in the shell.