A Pokedex for red, blue and yellow versions.
Keep a list of which Pokmon you have already caught. Unlike newer games, RBY versions do not tell you in battle if you have already caught a Pokmon, but with RBYDex, you can keep track of which Pokemon you have caught, ald filter those who don't.
RBYDex includes a list of all 151 Pokmon, which attacks these pokemon can learn, and at which levels. Is also tells you which TMs and HMs can be learned by every Pokmon.
Also RBYDex has information about how and where to catch each and every Pokmon in the game, including gifts, in-game trades, fishing and evolutions.
Do not worry about which game version you have. RBYDex tells you the different aspects of the version, like game exclusive Pokmon, moves learned at different levels and rarity of each Pokmon in every location.
Pokmon and Pokmon character names are trademarks of Nintendo. Other trademarks are the property of their respective owners.