That all depends on which game you are playing. In Gold, Silver, and Crystal he is in the bug catching competition. You can usually win the competition if you catch him. He's not very hard to find. In Blue, Red, and Yellow he is in the Safari Zone. Much harder to find. Ruby and Sapphire, you may be able to catch him, you may have to trade for him, I can't recall off of the top of my head. It all depends on which game you are currently playing.
You Can't, you'd have to trade it from Red or Yellow. In blue, unlike red, You can capture Pinsir, and Yellow has both.
If you are in the Dusk factory trying to free the Raichu, capture the Scyther- it has a 3 cut field move.
Scyther is an Bug and Flying type.
you can get scyther on route 11
Scyther was introduced in Generation I.
There isn't a trainer that has scyther.
it actually depends on the game you have sometimes scyther can only be found as a prize in the game corner so really scyther is rare.
If you are talking about the ones in the Dusk Factory then you capture a Pinsir and use it to cut the bars the bigger one requires a Scyther. Hope this helps.
Scyther evolves to Scizor when you trade Scyther while it is holding a metal coat and when the trade dones Scyther evolves into Scizorgive it a metal coat something like that.
Scyther only evolves when traded with a metal coat
You can't get scyther in leafgreen only firered can.
Scyther evolves when it is traded holding a metalcoat