Forretress

Forretress appeared in 1999 video game called Pokémon Gold & Silver. Forretress is a Bagworm Pokémon. Getting too close to Forretress triggers its defensive reflex, and it shoots out parts of its steal shell in every direction. It can't control this reaction, so being around it is dangerous.

Forretress is a large, spherical Pokémon with no visible limbs. The upper and lower halves of its body are capped by bumpy steel plates. The outer plates have zigzagging ridges that open along its back and front, revealing its smooth, red inner shell. The inner shell is punctuated by four cylindrical spikes, each tapering to an open point. Between the spikes, the inner shell opens along a straight line to reveal Forretress's eyes, which are round with large pupils. Whatever else lies inside its shell is unknown.

Forretress can defend itself from enemies by shooting out pieces of its outer shell, as a conditioned reflex rather than a conscious effort. It opens its shell to capture prey, but this happens so quickly that its interior body cannot be seen. It lives in forests, attaching itself immovably to tree trunks.