Who awakens the Oracle? Wait, one of you has the light within. From before time, I have watched and waited for the true hero to return. Present me 120 precursor orbs for each power cell I contain.”— The Oracle of Sandover Village when first approached.
The whole form of the Oracles can't be seen in any of the games, but in TPL, the back of the Oracle of Rock Village can be seen correctly. From the front, the Oracles have a humanoid face or head, with very big crystal eyes (with a power cell inside each one), and with a very big hole on his 'nose'. His chin has got an strange, spoon or shovel-like form bump, which provides power cells to Jak when he gives to him 120 precursor orbs. Also, he has two oval appendices on both sides of the body. Seen from side, it looks like a very big-headed turtle, with some dark spikes on his rounded back. Also, he has got another two oval appendices, but smaller than the other, making the role of hind legs. He is fully made-up in precursor metal.
Jak and Daxter: The Precursor Legacy
Three Oracles can be found in Jak and Daxter: The Precursor Legacy - one in Sandover Village, one in Rock Village, and one in the Volcanic Crater. All three have two power cells for eyes, which they will give to Jak in exchange for 120 precursor orbs. When first approached, the Oracles make cryptic pronouncements regarding 'the true hero' and 'the dark light'. Also, you can go behind the one in Rock Village and see what it looks like, just if you're curious.
Only one Oracle can be found in Jak II - however, its placement in the Water Slums and its lack of power cell eyes suggests that it may be one of the Oracles found in The Precursor Legacy. It no longer asks for precursor orbs; instead it demands Metal Head skull gems in return for teaching Jak to control his new Dark Powers. Like its predecessors, it makes cryptic comments when Jak provides it with the requested payment. It seems to be glowing in the eyes and in the trunk, unlike in Jak and Daxter TPL. This is the only known Oracle that can give Jak Dark Eco abilities. There is also an Oracle that greets Jak when he has completed the Tests of Manhood in Mar's Tomb. It is very different in appearance to a regular Oracle, unlike one of the ones in TPL, but is essentially the same thing. This Oracle wields the Precursor Stone, and is outraged when Baron Praxis tries to break the Stone from its fixings.
The massive triple Oracle found in the Monk Temple in Jak 3 less closely resembles a Precursor Robot than the Oracles found in the previous games. This Oracle grants Jak new Light Powers at certain points during the game in order to balance out his Dark Powers - unlike its predecessors, it does not demand any kind of payment. This is the only known Oracle that grants Jak Light Eco abilities.
Smaller versions of the larger Oracle, called Oracle Totems, can also be found in the Wasteland, Spargus and Haven City. When Jak gives these statues a specific number of Metal Head skull gems, the totem will give him a specific challenge. When Jak is able to successfully complete this challenge, the Oracle Totem will grant him a number of precursor orbs as a reward.
Heroes on the Move
The oracle can be seen in Heroes on the Move.