Magic 8-ball

The magic 8-ball can be retrieved from a pool table on the first floor above the ground floor in the Bishops' Shark Club. 'Using' the 8-ball displays vague if promising 'fortunes' similar to those on real world magic 8-balls popular in the 1970s. Rarely, the player will receive instead a clue to various secrets in Fallout 2. In many cases, knowing the location of the secrets is not enough; until the player activates the clue from the 8-ball, the secrets don't actually exist. Despair not if you haven't the patience; none of this type of secret offer rewards that can't be missed, other than maybe the secret password to the computer.

Fortunes

 * What kind of an asshole question is that?
 * Outlook good.
 * Outlook not so good.
 * My reply is no.
 * Don't count on it.
 * You may rely on it.
 * Ask again later.
 * Most likely.
 * Cannot predict now.
 * Yes.
 * Yes, definitely.
 * Better not to tell you now.
 * It is certain.
 * Very doubtful.
 * It is decidedly so.
 * Concentrate and ask again.
 * Signs point to yes.
 * My sources say no.
 * Without a doubt.
 * Reply hazy, try again.
 * As I see it, yes.
 * Stop shaking me so hard. It hurts.
 * You have a strong right arm.
 * Please wipe your hands before shaking me again.
 * Temporarily out of service.
 * Closed by order of the RPG Board.
 * Keep shaking me, and there'll be trouble.
 * I'm getting sick.
 * I'm getting nauseous.
 * Your hands are warm.

Clues
With Luck of 9 or higher:
 * Feargus was against putting me in the game. He's a big meanie.
 * Your score is 23 out of 100. You have quite a ways to go yet.
 * Scott Everts sighs a lot when he sees how many inventory items are in the game.
 * Look in the first floor men's bathroom toilet in the Mordino casino in New Reno.
 * Gets you 1 frag grenade, 1 pulse grenade, and 1 plasma grenade.
 * Somebody buried some cash beneath the cross labeled 'Trash' in Golgotha.
 * Gets you $374.
 * Go back and talk to Father Tully in New Reno after you have finished the game.
 * Gets you the Fallout 2 Hintbook.
 * There is an Easter Egg somewhere in New Reno.
 * It's in the basement of New Reno Arms.
 * Stop shaking me so hard.
 * Your LUCK is very high. Keep shaking me for clues!
 * Yes, we KNOW Descent to Undermountain was crap.
 * If you sell Bessie to the butchers in Modoc, you can set her free again.
 * Selling her is worth 300 Meat Jerky and -5 Karma. Saving her is worth +10 Karma, but a Modoc reputation drop.
 * Pay attention to what Curtis says after you return Mr. Nixon to him in Vault City.
 * His floating dialogue leads you to a Wrench.
 * With the feuding couple in Broken Hills, the wife really did throw the Cat's Paw in the trash.
 * The small blue pot outside the house is the resident trash bin.
 * You need a high STR *and* a high END to have a chance of beating Francis in the arm-wrestling contest.
 * The code to activate the first terminal in the Vault in Vault City is 3PCF186.
 * Gets you 2 stimpaks and a super stim.

Behind the scenes
It seems that Feargus and Scotty did win out in the end; the older version of the 8-Ball's dialogue mentions it being used as a weapon. It cannot be used to throw or punch now, though.