ms.TErry

Pebbles are Lame loots...I don't even remember a certain bazaar good that needs it...But if you like there's a bazaar good that lets you obtain 99x pebbles...you just need to sell some quality stones...I think it's 4 quality stones...hahaha...

About the Trickster...
The moogle said that it can't be found that easily right???Uhh....I think the area is called The Frozen Book...you will see monid there and he will tell you if the trickster is there and you'll have to make several trips back and forth on that area...Now before you fight I suggest you fight some monsters around the areas around the area where the trickster and monid is...you know to level up!!! Bide away you need to be at least at lvl.42-45 so you won't have much trouble...
While your at it and you want tons of money and your not on the rush,Why not battle some Couerls in golmore jungle???just kill em all but don't kill any other monster to make a chain ok""??Couerl pelts sell a lot...But you can only carry 99 so sell it to the moogle on the euryt village...Do this until you like and when you get 50 chains, you can unlock pirate's den figures and with using 100 teknicks and 50 steals will unlock some pirate's den figure too so use steal to every time before you attack a Couerl if your desperate for money and very Patient...but make sure to make several trips back to the area of the trickster until it comes out and Monid tells you it's there cause it's your primary goal right...

For strategy:
As soon as the trickster show in the middle of that area,dispel him of any status effects and berserk your 2 strongest characters then Haste your character that's not breserked...Why???to pulverize him and heal when you need it...Count yourself Unlucky when An ice elemental shows at the same time beacuse he'll give you problems....Do this until you kill em....Or you can use your own Technique...

Hope I helped...