Appearance
Forretress is a large, spherical insect-like Pokémon with no visible limbs. Bumpy steel plates cover it. Opened, a smooth red shell shows four spikes and round eyes with large pupils.

#205
Bagworm Pokémon
Forretress is a Bug / Steel-type Pokémon, No. 205 in the National Pokédex, introduced in Generation 2 (Johto region).
« In the moment that it gulps down its prey, the inside of its shell is exposed, but to this day, no one has ever seen that sight. »
Forretress is a large, spherical insect-like Pokémon with no visible limbs. Bumpy steel plates cover it. Opened, a smooth red shell shows four spikes and round eyes with large pupils.
It fires pieces of its outer shell by reflex and opens very fast to seize prey. In tropical and temperate forests, clamped to trunks, it levitates or hops; it evolves from Pineco.
Brock's Pineco evolves to save him, with a group of Pokémon, at a hot spring threatened by Team Rocket. Only Forretress goes with him to Hoenn, then stays home for Sinnoh.
Forretress doubles the r of a forest-fortress blend and may mix ferro, Portuguese for iron, and turret. It suggests a bagworm in a nut shell, a clam, and a cannon fortress.