Evolite

Evolite Serum was first manufactured by the alien race that produced Space Monkey. It is a synthetic compound that grants human-level or higher intelligence to non-human primates, as well as frequently triggering psychic abilities.

Known properties of Evolite:
 * Gorillas receive human-level intelligence and superhuman strength.
 * Monkeys and Chimps receive superhuman intelligence and reflexes.
 * Spontaneous development of language skills is common.
 * The subject remains in a highly suggestable state for several hours after the injection, frequently basing a significant portion of his personality on whatever he is exposed to at that time. For instance, inject a monkey while he is watching a Christmas Special, and he may very well develop the belief he is an elf or Santa Claus.
 * Evolite has no effect on a genetic level nor is the effect inheritable by offspring of the injectee.
 * For the first 24 hours after the Serum is administered, it remains in the bloodstream. During this period, exposure to radiation or toxins can have further effects:
 * About 30% of the time, the monkey dies, often quite dramatically.
 * About 50% of the time, the monkey develops mental abilities -- Ego Blast, TK, or Mental Illusions. These are associated with a change in color (Green, Blue, and Orange, respectively) and are generally in the High range (10-12 DCs).
 * About 10% of the time the monkey becomes a 'normal' monkey again.
 * Subsequent exposure will kill the target 90% of the time and turn it into a purple monkey with a variety of mental powers otherwise.

While originally the serum could only be manufactured by the Sentient Saucer, enough samples have made their way into human hands for it to be duplicated. Thus far, this has not typically resulted in armies of powerful psychic monkeys taking over the world. Relatedly, it is speculated that variations of Evolute Serum could have similar effects on other animals, but thus far no such results have been reported.