Actually you can't get one on pearl or diamond.
The only way(s) to get one is if you have Pokemon Emerald and for starters choose Chikorita and raise it to a Bayleef then migrate it over to your pearl version then catch it at Pal Park.
Or I think you can use AR(Action Replay) or some kind of cheat, but I don't cheat so I wouldn't know.
sorry...well I hope I helped(:
Train your Bayleaf.
You can't without a cheating device, or a copy of Gold, Silver, Crystal, or any of their remakes.
No. :l P.S. Ash is a boy and if he had a pokemon with flowers on it (bayleaf's evolution has flowers) everyone would laugh when they see the pokemon.
he has these Pokemon: lvl18:bayleaf lvl15:gastly and another but can't get to it if you chose totodile
Emerald.
Trade one from Pokemon colosseum or get a chikorita from either Pokemon emerald or Pokemon xd gale of darkness then train it to level 16.
Chikorita- bayleaf lvl16 bayleaf-meganium lvl34 I believe, if not the you can check serebii.net there's a pokedex thingy with all Pokemon and there info
Its Ethier LV 16 Or LV 14
If you complete the Hoenn Pokedex you can get a Joto starter, or you can them by trading Bayleaf from Pokemon Colloseum (after it is pruified) from Gamecube to leafgreen or firered, then breed it, then trade the Chikorita to Emerald, the to Ruby! It's very complicated, but it's the only way without cheating!
Bayleaf evolves into Megainium at level 36.
its not an emerald its RAYQUAZA the main legendary Pokemon in Pokemon emerald.
aftewr you get your national pokedex you will get a place where you can catch it only of you have the bayleaf on Ruby.
You cannot get a Yanma in Pokemon Emerald, as only Hoenn Region Pokemon can be found in Pokemon Emerald.
Train your Bayleaf.
bayleaf is not on pokepark wii only chikorita is
There is no PalPark in Pokemon Emerald.
Sinnoh Pokemon DO NOT EXIST IN EMERALD!!!