I'm pretty sure that Bulbasaur was the first Pokemon. If you check the Pokedex and look for Bulbasaur it should say No. 1
You must have chosen bulbusaur at the beginning of the game and have the pokedex eventually entei will show up when your in grass. If you didn't choose bulbusaur find someone who did get entei, if you have a Pokemon colosseum you get a shadow entei from the game.
You can encounter a Rhydon on Victory Road on the first floor. A trainer on victory road will also have a Rhydon in his party.
Bellsprout which evolves to Weepinbell then Victreebel (by leaf stone), Bulbusaur which evolves to Ivysaur then Venusaur, Tangela.
It wasn't available until diamond and pearl, but you can find ryhorn it the safari which evolves into rydon
Choose bulbusaur as your starter receive the national pokedex deliver the ruby and sapphire to celio then look around kanto for it and use your masterball on it.
The first Pokemon that was invented was rydon IT WAS BULBASAUR
If by 'rydon' you mean Rhydon, no.
you cant bulbasoar is not a sinnoh Pokemon
Bulbusaur, Squirtle, Charmander.
Bulbusaur and the reason why is because the first 2 gym leaders can be easily defeated by grass moves and bulbusaur is a grass type that can learn grass moves.
you can not catch bulbasaur you have to pick him as your starter Pokemon
A rock/ground pokemon.
rydon
trade it into Pokemon emreld
Need to have picked bulbusaur as your starter.
level 16
you have to get a rydon and trade