there are a lot to mention but I'll give some. in Pokemon Yellow you can have Pikachu, Charmander, Bulbasaur and Squirtle all at the same time where in Red and Blue you can only have one. Meowth is not wild in the Yellow version but can be caught in the Blue version.
u get different Pokemon in each one and u get different legandaries
Red/BlueThey have diffrent catchable Pokemon. You can catch Ekans in Red but not in Blue. And Water Pokemon are stronger in Blue. Fire Pokemon are stronger in Red. Charmander can beat Squirtle (Rival's Pokemon) in Red but not in Blue.
yes
no, you catch different Pokemon in yellow, you get ALL 3 starters, and theres no glitch in yellow. :)
you trade them over from Pokemon red, blue or yellow.
Not Red but Blue is he is named Gary though.
trade with Pokemon blue
the first pokemon games came out in 1999, which were pokemon red and green. blue came out in the same year, just a different month.
You can't get the Blue Orb in Pokemon SoulSilver. Only the Red Orb, which can be obtained from Mr. Pokemon after defeating Red.
You can catch different Pokemon depending on the game -------- You can also catch Gen2 and Gen3 Pokemon, and the glitches are for the most part removed.
You can't find Ekans in Pokemon Blue. You have to get it by trading from Pokemon Red.
The same Pokemon as you, as you are Red in Fire Red. Your rival is Blue/Gary.