Rocky DeSantos was the second Red Ranger and the Blue Zeo Ranger.
As the second Red Ranger
Rocky first met the Ranger teens when saving a baby along with his friends Adam Park and Aisha Campbell. The three of them lived in Stone Canyon (a fictional city in California) and were visiting Angel Grove to represent Stone Canyon in the Team Ninja Competition. Because of his skill as a martial artist, Rocky became an immediate target of Lord Zedd, and along with Adam and Aisha, ended up kidnapped and thrown in the Dimension of Despair, along with their favorite Stone Canyon teacher, Mr. Anderson. Luckily, the Power Rangers came to rescue them just in time, but not before Rocky, Adam, and Aisha discovered the Rangers' identities when Tommy Oliver and Kimberly Hart had to take off Billy Cranston's helmet after Billy fought with the Serpent of Darkness. Rocky, Adam, and Aisha were later taken to the Command Center to meet Zordon and were sworn to secrecy. Rocky (along with Adam and Aisha) eventually moved to Angel Grove permanently.
Rocky was chosen to replace Jason Lee Scott as the Red Mighty Morphin Power Ranger after Jason, and his fellow Rangers Trini Kwan, and Zack Taylor were selected to attend the peace conference in Geneva, Switzerland. Rocky was entrusted with the powers of the Tyrannosaurus Power Coin and the Red Dragon Thunderzord. In addition, he became second-in-command of the team.
In Season 3 of MMPR, Rocky went through one of the most disastrous events for a Red Ranger (despite him not being the leader) when the Thunderzords were destroyed by Rito Revolto and his band of monsters, thus also destroying the original Dinozords and damaging the Power Coins beyond use. Rocky later gained new Ninja powers of the Ape, becoming the Red Ninja Ranger. As a Ninja Ranger, he could perform slide-teleportation, the decoy suit trick, and other Ninja powers. Rocky's Ninja power was enhanced strength and the ability to quickly climb up surfaces. Rocky also gained the ability to pilot the Ape Ninjazord, as well as the Red Shogunzord. He was also later granted the power of the Metallic Armor.
The Rangers managed to get the Zeo Crystal, but wanted to make sure that Master Vile couldn't get it again, so the Rangers split it into five sub-crystals and sent them to different points in history.
Vile then turned back time using the Orb of Doom, turning the Rangers back into children. The Rangers soon recruited the Aquitian Rangers to fight in their stead. Billy had then created a device which would restore their them to their old selves. He used the Ninja Coins as a power source, testing it on himself. This worked, but it allowed Goldar to capture the coins and Zedd destroyed them.
Search for the Zeo Crystal
Rocky's quest for his sub-crystal took him back to Mexico, where he met a young boy who was actually a younger version of his grandfather. The sub-crystal turned out to be the maw of a near active volcano. With some climbing equipment, Rocky retrieved the crystal before the volcano erupted. Bidding farewell to his grandfather and the village, Rocky was the first to return to the present with his crystal.
As the Blue Zeo Ranger
All the Rangers returned with their sub-crystals, save Aisha, who chose to stay in Africa and help save the animals there; she sent a young girl named Tanya Sloan in her place. When he returned back to his adulthood the second time, Rocky and the other had to escape the doomed Command Center from a planted bomb by Rito and Goldar. From the wreckage, the Rangers found the Zeo Crystal and the entrance to the Power Chamber, where Zordon and Alpha were still alive. However, a new threat to Earth came in the form of King Mondo and his Machine Empire.
With their old powers destroyed, the Rangers had to harness the Zeo Crystal for new powers to battle the empire. The Triangle sub-crystal allowed Rocky to become the Blue Zeo Ranger. During this time, Rocky faced a new set of villains and adventures. He also became fast friends with Tanya, along with helping her adjust as an adult (as she was a child when she first arrived). Rocky took up an interest in baseball, which Mondo once used to get rid of him. When Mondo and the Empire started getting stronger, Rocky and the Zeo Rangers were assisted by the mysterious Gold Ranger. At first, Rocky and the others assumed Billy was the Ranger (as Billy retired), but it was later revealed he was an alien named Trey, from the planet Triforia. When Trey's powers were threatened, as Billy couldn't take on the powers, Rocky's predecessor, Jason Lee Scott, came back to assume the powers.
With Jason as the Gold Ranger, he also took over his second-in-command title; Rocky soon began to feel left out and also felt he was being replaced by the Ranger he replaced, as everyone seemed to want to do something with Jason instead of Rocky. Trying to prove his worth, he attempted to take on King Mondo by himself. It was only afterwards he realized he was an important part of the team, as well as a friend to Jason.
Rocky loved to have fun and enjoyed going to dances, carnivals, mystery parties, luaus, and hanging out at Ernie's. He was more than willing to join in a scavenger hunt, helping in clean-up projects, and even become an stuntman in a sci-fi movie. Rocky liked to challenge his brain as well. He attempted to teach a chemistry class, enjoyed computer science, and botany classes and going to museums and learning about other cultures.
A rugged outdoors guy with the rugged good looks to match, Rocky is a guy with a big appetite for life (and food) and keeps his energy going by staying active physically. He enjoys working on his karate, running with the guys, playing volleyball, football, snowboarding, even doing splits. Rocky also channelled his energy by becoming a lifeguard.
It's with this enthusiasm towards everything, that during a practice match, Rocky threw himself into a kick and wounded up landing and hurting his back. While he recouped in the hosptial, his friends were facing a new danger and Zordon had to recruit a new Ranger. Rocky never begrudged the fact that he was unable to become the Blue Turbo Ranger. Instead he was relieved that his era of being a Ranger was over. After seeing his friends off at graduation, Rocky opened up his own Karate School. After many years in service as a Ranger, Rocky is enjoying his post ranger life teaching karate and making the hearts of women everywhere melt with a smile and a twinkle in his eye.
- Rocky is the first Ranger of Latino descent followed by Carlos Vallerte and Danny Delgado, as well as the first Latino Red Ranger, followed by Red SPD A-Squad Ranger Charlie.
- Rocky is the only Ranger retired due to an injury.
- Rocky was the only Red Ranger not to appear in Forever Red. His actor, Steve Cardenas, was contacted and he apparently agreed to be in the episode, but he was moving houses at the time and contact was lost. It is unknown if he would've been the Red MMPR Ranger again had he appeared since Jason (Austin St. John) assumed those powers.
- Rocky was the first Red Ranger to not be the leader of the team, followed by Aurico and Wes Collins.
- Rocky was the first Red Ranger to later become a Blue Ranger, followed by T.J. Johnson. Ironically, later Blue Rangers Sky Tate and Bridge Carson would later become Red Rangers.
Red Mighty Morphin Power Ranger
- Wrist Communicator
- Power Morpher
- Tyrannosaurus Power Coin
- Ape Ninja Coin
- Blade Blaster
- Power Sword
- Power Scope
- Red Ninja Ranger
- Metallic Armor
- Red Shark Cycle
Zeo Ranger III - Blue
- Wrist Communicator
- Blue Zeo Sub-Crystal
- Zeo Laser Pistol Powered up
- Zeo Power Hatchets
- Blue Zeo Jet Cycle
- Yuuji Mita - His Blue Ranger Sentai counterpart