Catch Hoppip in the Five Isle Meadow or Memorial Pillar (Mostly) and get it to level 18.
Hoppip evolves at lvl 18, and some extra information it evolve into skiploom and skiploom evolves into jumpluff at lvl27.
Skiploom is a Grass and Flying type pokemon.
Skiploom evolves at level 27.
You can't, must trade from FireRed/LeafGreen/Colosseum/XD.
skiploom
jumpluff
Skiploom is #188 in the national pokedex, and it is a Grass-Flying type Pokemon.
It evolves into Skiploom.
Yes you can trade leafgreen version Pokemon to another leafgreen version.
Level 27
this Pokemon is phione, the one that looks similar to manaphy.
you don't catch it