Secrets - Pokemon Red, Blue and Yellow Guide - IGN

While there aren't any hidden codes in the game, there are a couple of secrets and odd glitches. Below, we list the most important ones. This page also

Kabutops - Pokemon Red, Blue and Yellow Guide - IGN

Geodude - Pokemon Red, Blue and Yellow Guide - IGN

Sandshrew - Pokemon Red, Blue and Yellow Guide - IGN

Sandslash - Pokemon Red, Blue and Yellow Guide - IGN

Bulbasaur - Pokemon Red, Blue and Yellow Guide - IGN

Route 24 - Pokemon Red, Blue and Yellow Guide - IGN

Flareon - Pokemon Red, Blue and Yellow Guide - IGN

10 Big Changes from Pokemon Yellow to Pokemon: Let's Go – GameUP24

Seadra - Pokemon Red, Blue and Yellow Guide - IGN

Growlithe - Pokemon Red, Blue and Yellow Guide - IGN

17 SECRETS You Didn't Know about Pokemon Red & Blue

Diglett's Cave - Pokemon Red, Blue and Yellow Guide - IGN

Machamp - Pokemon Red, Blue and Yellow Guide - IGN

Alakazam - Pokemon Red, Blue and Yellow Guide - IGN

Pokemon Blue Version [Walkthroughs] - IGN