Onix

Onix, the Rock Snake Pokémon, holds the Pokédex number #95 and first appeared in the original Pokémon series — Generation I. As a Rock/Ground-type, Onix is a massive, serpentine creature composed of boulder-like segments that embody its rugged nature. This design plays into its dual type's strengths and weaknesses, making it highly resistant to Electric and Poison moves, yet vulnerable to Water and Grass attacks. Onix is noted for its towering height of 28 feet, which adds to its imposing presence both in the games and visually as a character.

In the mainline Pokémon games, Onix first appeared in the Kanto region, where it was famously known as the signature Pokémon of Brock, the Pewter City Gym Leader. Onix's role as a Gym Leader staple helped cement its image as a formidable challenge for new trainers. Throughout the series, Onix has been a recurring sight, appearing in games like Pokémon Gold and Silver, where players could evolve it into Steelix using a Metal Coat, thereby increasing its strategic versatility.

Onix's enduring presence across generations is attributable to its early introduction and the nostalgic ties it holds with fans who started their Pokémon journey in the late 90s. Its evolution into Steelix in later games provided new layers to its gameplay appeal, keeping it relevant as new mechanics and regions were introduced.

The Pokémon Company has continually included Onix in various games, spin-offs, and media, symbolizing its lasting popularity. Whether battling in the rocky terrains of the Sinnoh region or appearing in titles like Pokémon GO, Onix consistently captures the rugged spirit of the franchise's early days.