You can make extra Gil with Edea's Letter. Take it to a shop and you can sell it for 125 Gil. It isn't much, but it can help if you're short on cash. Return to Edea's House and speak with Edea
again. She'll scold you and then hand over another letter. You can continue to sell her letters and get new ones to your heart's content.
This isn't a great money maker, but it's kind of humorous.
Control Panel Secret
You can toy around a bit with the Missile Control Panel at the Galbadian Missile Base. Choose to go to the Equipment inspection screen and you'll se the equipment used by the Galbadian Army. Hold down both the Triangle and Square buttons and press up or down on the control pad. The scene will switch to either a dancing Galbadian Soldier or Elite Soldier. Pretty strange stuff.
Alexander Card
If you missed out on the Alexander Card in the Lunar Base, you can still win it from Piet. The escaped pod crashed in the Abadon Plains, which is south of Tears' Point outside of Esthar's cloak. Land on the island and search the area. You can't see the crash site, but you'll automatically get taken there if
you step in the right area. Piet is sitting next to the escape pod cursing his
bad luck.
Esthar Shop Gifts
Cloud's Shop will randomly give you a Hi-Potion during the first visit, and an X-Potion during
your second visit. Johnny's Shop will randomly give you a Hi-Potion during the first visit, and a Mega-Potion during your second visit. Karen's Shop will randomly give you a Hi-Potion during the first visit, and a Mega-Potion during your second visit. Cheryl's Shop will only randomly give you one item: the Rosetta Stone. Visit Cheryl's Shop during the Lunatic Pandora event in Esthar when you are in control of Zell.
Easy Life Restoration
As soon as you have Status-Attack-Junction, get 100 Drains and junction them to whoever has the ability. Depending on how much damage you do, you will be healed if you hit the opponent!
Easy Card Game
Want to play any card game without those ugly rules you hate so much? Then don't spread them! By playing a card game with somebody that says they want to play with combined rules, and you accept, the rules will spread. To avoid this, when they ask you
to play with combined rules, say NO. Keep saying no until they play with just the regular rules by just saying "wanna play" or whatever they say.
Easy Spells
To get powerful spells easily is easy. First gain Diablos' Enc-none ability (you must complete the Enc-half ability first before this shows up), and junction it. Now go to either the Island Closest to Heaven or Hell, and you can draw all you want from the draw points there without encountering any monsters!