Grodd

"I ... am ... GRODD. FEAR ME."

- Grodd speaks while possessing General Eiling through his mental powers.

Grodd is a gorilla that was experimented on in S.T.A.R. Labs, and the only known non-human meta. Four years before the particle accelerator accident Grodd was kept as a test subject in S.T.A.R. Labs. He was scheduled to be part of enhanced gene therapy experiments conducted by Harrison Wells and Wade Eiling, the latter of whom wanted to explore the possibilities of mind control, torturing Grodd in a similar manner to that in which he tortured Martin Stein. However once Wells discovered Eiling's inhumane methods he shut down the program but decided on other plans for Grodd himself. Along with Wells, Caitlin also grew fond of Grodd and often visited him in his cage.

The S.T.A.R. Labs accident
When the S.T.A.R. Labs particle accelerator exploded, the dark matter it released activated the drugs and medicines Eiling and his men had administered to Grodd, as well as possible surgeries done to him, awakening his psychic powers. The gorilla then destroyed his cage and escaped. Thawne showed the cage to Barry Allen when he was taking him around S.T.A.R. Labs.

Living in the sewers and working with Thawne
He took up residence in a sewer and began carving his own name into a wall repeatedly. He was encountered by workmen, who attempted to run but were attacked (and seemingly killed) by Grodd. Later, the Reverse-Flash abducted Wade Eiling and brought him to Grodd, revealing his identity as Harrison Wells. Grodd displayed telepathic powers, as Eiling could "hear" someone talking in his head and mentioned God. Grodd corrected him and said his own name before grabbed Eiling from behind and drag him away. Three months later, after Wells is exposed as the Reverse-Flash, he sends Grodd to distract Barry Allen's team. To that end, Grodd mentally controls Eiling into attacking a gold reserve. As the Flash arrived on scene, Grodd, using Eiling as a conduit, incapacitated Barry by bombarding with mental hallucinations of Eiling's experiments on him, before having his puppet flee the scene. Grodd continued to control Eiling by attacking a police escort before he was captured by Barry and imprisoned in the S.T.A.R. Labs particle accelerator. Grodd communicated through Eiling, acknowledging Barry and Caitlin Snow by name. Grodd later kidnapped Joe West, severely injuring him by braking his ribs in the process, when he, Barry and Cisco Ramon were searching the sewers for him. When Joe pulled out his gun, Grodd used his powers to make Joe point his gun at himself, but doesn't fire it while showing how he dislikes guns and bananas. Later, Cisco and Caitlin force Grodd away from Joe by remotely venting steam pipes so he'd be far enough for Barry, who was protected against his telepathy with a headband, to hit him with a super sonic punch, but Grodd's sheer size and strength enabled him catch his fist and lift Barry into the air by the neck. As he tossed the Flash through a brick wall into a subway tunnel, the latter lost his headband, allowing Grodd to mentally attack him again, crippling him as an oncoming train was approaching. However, with help from Iris West's motivation, Barry obtained the will to overcome Grodd's attack and evaded the train. Grodd leaped at Barry, who dodged the attack, and the gorilla was hit by a second train. However, Grodd survived and made his way to the surface, climbing and jumping off a building, furious.

Powers

 * Animal strength: Grodd has shown animalistically high strength, far more than any other gorilla, due to being able to pull away and lift a full-grown adult human male with absolute ease and with one hand only, though humans have been shown to slightly resist his strength, as an underground workman grabbed onto a wall and only be pulled off a few seconds later. As Barry attempted to perform a super sonic punch on Grodd, he charged in Barry's direction and caught his fist with absolute ease.
 * Enhanced Durability: Grodd is durable enough to survive getting hit by a train and withstand a super-sonic punch from the Flash, as well as several super speed enhanced physical attacks from Barry. Both of Barry's physical attacks did absolutely nothing to him.
 * Telepathy: With the ability to send neurological signals beyond himself and into others, Grodd gained telepathic and mental manipulation based abilities. Grodd possesses the ability to speak telepathically to others. He can also use this ability to control humans like puppets. For offensive purposes, Grodd can overwhelm the minds of his enemies with his own negative memories and severely disorient and cripple them. Such attacks can be projected via those under mind-control. This can also allow him to sense when The Flash is running at him, even at the speed of sound. It would also seem that it takes time for him to be able to mentally possess people as Eiling was shown to be possessed and completely under Grodds control, to the point were Eiliing even had a voice like Grodds, three months after he starting using his power on him. It would allow seem that that if one of his puppets is at close proximity to others, even if he is far away, he can use his telepathy on whoever his puppet sees as Grodd was not near Barry and Eiling when they both were first disoriented by Grodd's powers. Therefore he can extend the range of his telepathy through his puppets. It would appear that his range of influence is only on what he can physically perceive through his senses, primarily his sight, though his hearing may also allow his to become aware of those he can use his telepathy on. He has only demonstrated his power to its fullest when his victims were in his line of sight or have been continually exposed to his power to the point where he can develop a lasting physic bond to his victims and possess them as he did Eiling, though his being hit by a train and possibly injured caused him to stop possessing Eiling.
 * Animal Agility: Grodd can scale a building and maneuver through sewers despite his large size with minimal effort. He can also move fairly quickly for his size.

Skills

 * High-level Intellect: Grodd is very intelligent. Based on the math equations scrawled on the walls of his sewer home, Grodd's intelligence is rapidly expanding.
 * Multilingual: Although he was using his telepathy, it can be assumed that Grodd is capable of fluently speaking English and animal languages.

Weaknesses

 * Telepathic Headset: Cisco invented a headset that can keep Grodd from using his Telepathy on Barry. It opposed his neural signals through magnetism, blocking the signals from the user's body and mind and effectively protecting them from physic attacks.

Trivia

 * In DC Comics, Gorilla Grodd obtained his heightened intellect, telepathy and telekinesis after being exposed to the radiation of a meteorite. This same meteor also enhanced an entire troupe of gorillas which went off to create an all-gorilla civilization, Gorilla City.
 * Hector Hammond, a Green Lantern villain, obtained his own psychic powers after being exposed to the same meteorite.
 * Grodd's dislike of bananas is a trait shared by his counterpart from the animated series Justice League/Justice League Unlimited.
 * The yellow helmet Grodd had Eiling wear is likely a reference to DCAU Grodd's mind control helmet.