Not Rare, Not hard to find, but These are your Friends, Pokemon's Version of Pheonix Downs. And how oftain have you gone through some place (Let's say Zero Island for a GOOD EXAMPLE, Spacial Rift for a Personal one.) And, you suddenly find your Supply full of Plain seeds, then you find yourself saying "How the Heck did I use all of My Reviver Seed. I Only Brought 5 of them!". Oh and Do I need to Mention Monster Houses that can suck thoes Reviver seed dry? they're not Rare or hard to find but I'm sure they deserve a Special Note for being perhaps THE most Important Item in the Game. So here's the big question, WHERE'S the best Place/What's the Best way to Find them? In FF4 I can Buy a Bunch in the sotre with no Problem but here it's like Hit or miss with Kecleon, Jobs only give you 1, normaly. And, lets face it, Your Friend's A) Probably not gonna have the seed to Trade or B) needs every last seed for his Own Exploration...

Every day look in the shop. There is usually one or two.

1) Shop, as mentioned
2) Deluxe Box at the end of dungeons that is unlocked by doing escort mission on the left board.
3) Sentry Duty