after you get the national dex it appears in the great marsh safari zone
Crystal Spearow Exeggcute
Safari Zone
you can't trade from pal park
after u find it on its island it roams shinno
You can't catch Exeggcute on Pokemon Sapphire. You need to trade one from Fire Red or Leaf Green.
In Route 209 Lost Tower and Turnback Cave.
First of all it is Pokemon Platinum NOT Pokemon platnum. The best way I would is by using a master ball. but you can keep holding it off and about an hour later use a timer ball.
You can do this: get a gam to trade with ( soul silver, heatgold, platnum, diamond, pearl) start your game choose a starter catch another pokemon and trade it to another game, restart and repeat process until 3 pokemon are on the other game, then trade them back to platnum
go to the pokemon mansion and below it in the grass just b-fore the fog it is in ther but hard to catch
u import it from emerald after u get the national dex. no ther way
Pokemon Platnum comes out on March 22, 2009 in the U.S.A.
Gloom, Exeggcute, Weepinbell, and actually I think that's it since you can't catch Nuzleaf (or can you?).