Curb-Stomp Battle: As the evil Green Ranger. After that, they had him doing his own thing for a while, but coming whenever the other Rangers summoned him (this had to be done to keep him in time with Burai). Then came "The Green Candle", where he was curbstomped himself.
He then does this to Goldar in Season Two unmorphed after Lord Zedd drained the last of his powers. After this, Goldar was never the same again.
Heel-Face Turn: After The Sword of Evil was destroyed the spell was broken.
Incest Is Relative: Implied twice. Once in the Stable Time Loop, and once in the episode "Wild West Rangers", wherein it's implied he and Kimberly are both descended from Kimberly's ancestor and the White Stranger.
Punny Name: His last name is Oliver because he wears green. This became an artifact though, once he switched to white (and later red and black). Even then it still fits, because real olives have a black outer layer and a red inner portion. White is still out of luck.
Rapunzel Hair (started out almost shoulder length - got much longer)
Took a Level in Dumbass: Kind of. When he makes the transition from Evil Green Ranger to Good Green Ranger, he does some really stupid things. Constantly forgetting his communicator and getting captured by Putties. They even have an entire episode focused on his forgetfulness. In reality this is simply because the footage of his Sentai counterpart was limited.
On an unrelated note there's one episode where he's training for football and when he tackles a football dummy, he gives it a round house kick. What?
Verbal Tic (His distinctive "sikKEYAHHH!" when fighting.)
What Could Have Been: Jonathan Tzachor a producer on the show and big fan of Sentai wanted Tommy to die just like his sentai counterpart, but he was overruled presumably for BS&P reasons. Seeing how Tommy's popularity was a huge contributing factor to Power Rangers becoming popular enough to exceed its original order of 40 episodes, this was probably a good thing.
In earlier scripts, Tommy was going to be a biker named Rocky.
Zack Taylor/Black Ranger I | (Actor: Walter Emmanuel Jones)
The Gun Slinger: He could wield the axe in close combat, or he could flip it around and use it as a laser gun. The blade served as the trigger and the handle became the barrel.
Big Eater: Not as much as the second Red Ranger (see below) but he's known for devouring huge bowls of ice cream.
Black Best Friend: In fact the actual reason why the black guy was put in the black suit. The producers wanted to deliberately invoke this trope with Zack to Jason, and since Zyuranger footage had the Black Zyuranger as the Red Zyuranger's best friend and it showed in footage...
Catch Phrase: "Always remember, the hand is quicker than the eye."
Dance Battler: His part in the opening credits is him dancing and later episodes show his skill in "Hip Hop Kido."
Determinator: Most prominent is his solo battle with the Knight Monster.
Dogged Nice Guy: With Angela; a minor running gag is her shooting him down.
Brainwashed and Crazy: Averted in a Funny Moment. Goldar kidnaps Kim and uses a mind control spell which will turn her into a copy of Rita for Zedd to marry. The spell doesn't work... but Kim does a pitch-perfect Rita impersonation (including "I'm having a headache!") to hold Goldar, Squatt and Baboo off long enough to be rescued by Billy and Trini.
The Chick: She was the template for all Power Ranger chicks thereafter: kind, girly, and pink minus the valspeak.
Fainting: Played for drama in her final arc; Ranger duties combined with Olympic training and power draining caused these.
Girly Bruiser: Wearing a pink dress and jewelry, she beat up Putty Patrollers.
Hidden Depths: Despite being portrayed as a bit of an airhead in early seasons, she's shown to be actually quite proficient at sign language as early as the fifth episode! And in another season one episode, the fact that she's an A/B student indicates even if not on par with Billy and Trini, she's actually quite intelligent since C is considered average.
Ill Girl: When her Crane Ninja Coin was in the possession of Rita Repulsa & Lord Zedd, she slowly became weaker.
Ms. Fanservice: What's that, the Thunderzords are being destroyed? I couldn't pay attention thanks to the short-shorts and midriff-revealing shirt. And that's not to mention the gymnastics leotards...
Rule 34: Granted, many of the Rangers could qualify for various reasons (Trini for She's a Man in Japan, the male Rangers for being Messrs. Fanservice or Chick Magnets, all the brainwashing), but Kimberly had a whole newsgroup dedicated to her. And like Austin St. John, Amy Jo Johnson was rumored to have starred in porn.
Dual Wielding: Billy could use the Power Lance as a Double Weapon, or he could separate it into two shorter tridents and wield one in each hand.
The Glasses Come Off: Starts slowly during the helmetless scenes beginning in "The Mutiny". He officially lost them after the movie (during season 2) and when he returned to the show, they explained he replaced them for contact lenses. He would wear them two more times in Power Rangers Zeo.
David Yost: the glasses came off actually when we went to shoot the movie in Australia and that's because I told [laughs], I told the (movie) producer, this is without the creators or producers of the TV show knowing, I told the producers of the movie that I would rather not wear my glasses and they were like, okay [laughs] like they didn't really think anything about it.
He also stated in the same interview that because the glasses weren't real, they began to affect his vision (they had no prescription, but the chemical they used to prevent glare affected them enough to bother him.)
Hollywood Nerd: They tried to dress him to conceal that he's muscled like a plow horse. Didn't work. They didn't even bother hiding his huge muscles in The Movie; then again, the movie never portrays him as the Smart Guy or a nerd.
Improv Fu: Kind of sucked at fighting, but he managed by using this trope, though by the time he left the Rangers he'd gotten much better at hand-to-hand.
Meaningful Name: If want to be nitpicky. His name begins with a B, the second letter in the alphabet. Blue is now the second most prominent color in the Power Rangers series.
Sesquipedalian Loquaciousness: Instead of saying 'I like this music' he'll say something like 'the lyrics of this song surpass its contemporaries in this genre'.
The Smart Guy: He built the communicators, the flying car, fixed Alpha, fixed the Command Center...
Teen Genius: He did the above on a high school education.
Took a Level in Badass: In the first fight, he's awkward and has to be bailed out by his teammates. After training with Jason's class at the Youth Center, he's as formidable as the other Rangers.
Trini Kwan / Yellow Ranger I | (Actress: Thuy Trang)
Action Girl: She's a calm and poised young lady but on the battlefield she's a fierce kung-fu fighter. Plus, she was actually the very first ranger to destroy a monster by herself and the first to fight one-on-one with Goldar.
Asian and Nerdy: Not particularly nerdy herself, but the only one able to understand Billy's geek speak.
Jack of All Stats: She was probably the most balanced of all the original team. Smart, but not as smart as Billy. Graceful, but not quite as much as Kimberly (who was a gymnast.) Skilled, but not quite up to Jason.
Meaningful Name: Sort of. Trini-Trinity which is related to the number three. Yellow would go on to be the third most prominent color in the Power Rangers series.
Ms. Fanservice: People often forget but Trini would often wear clothing just as revealing as Kimberly's, sometimes even more so depending on the episode. Watch any old episode and you'll notice Trini wearing sleeveless shirts, shorts, and showing her midriff on par with Kimberly.
Or Was It a Dream?: "For Whom the Bell Trolls", revealed when a doll version of the episode's monster appears in floor beside her; probably dropped by Squatt when he tried to steal it.
Put on a Bus: Left Angel Grove with Jason and Zack to attend the International Peace Conference in Switzerland in "The Power Transfer".
Soapbox Sadie: Probably her most unique traits as a ranger were activism and environmentalism (holding petitions, starting a clean-up club etc.).
Jason Lee Scott / Red Ranger I | (Actor: Austin St. John)
All American Face: You can clearly tell this was the writers' intention with his character, even though the actor playing him was of mixed race. Fans just assumed he was an All American guy with a good tan.
Chekhov's Gun: The green Power Coin in "Return of an Old Friend".
The Danza: An ironic case. Jason Geiger earned the Stage Name Austin St. John (inspired by The Six Million Dollar Man) as his agency thought it wasn't a strong name... and he ended up playing a Bad Ass called Jason. According to Tommy's actor Jason David Frank however, it was due to a disagreement the two had when they first met backstage.
Determinator: "Isn't the smallest chance of victory enough of a reason for us to keep on fighting? The world needs us, Rangers!"
My Greatest Failure: Jason blamed himself for not getting the Green Candle in the first place when he had the chance, even though Tommy in that episode explicitly did all he could to talk Jason out of going back to get it. He had no choice, as Zack had to remind him that Tommy's life was more important than his powers. In the second season, after Tommy's Green Ranger powers finally run out completely, he writes a letter to Jason telling him not to blame himself for what happened.
Odd Name Out: The only original ranger who's name doesn't end with a "ee" sound, probably to symbolize his status as leader or it's just a coincidence. Zack rarely being called by his full name(Zachary), Kimberly sometimes being called Kim, Trini having a rather unique name and Tommy not coming in until later made this trope almost unnoticeable
Old Soldier: Being the original Red Ranger, he has this mindset in "Forever Red" towards the newer ones.
Put on a Bus: Left Angel Grove with Zack and Trini to attend the International Peace Conference in Switzerland in "The Power Transfer".
A Day in the Limelight: He got the most focus of the replacement rangers. In fact, the first two episodes after The Power Transfer were centered on him and provided pretty substantial character development. Where as Rocky and Aisha'a first focus episodes just made them seem inferior to their predecessors.
Out of Focus: For the most part, she was just around to be Kimberly's BFF and nothing more. She started to get some focus in later episodes but by then it was pretty much too late. And the fact that she had such a short tenure also doesn't help.
Put on a Bus: By the time the Alien Ranger Mini-Series came around. The actor had decided to leave before its resolution. Thus in the show, when Aisha, whose still a kid by that point, searches for a Zeo sub-crystal in Africa, she decides to stay and help the wildlife there, selecting Tanya to take her place.
The Generic Guy: To the point where the only reason he's the Lancer in the Five-Man Band is pretty much by default. He doesn't have much significant characterization and wouldn't really get any until Zeo.
Informed Attribute: Several official sources constantly say he's a class clown. When watching the actual series you'll find that's really not the case.
There actually is one episode (Rocky Just Wants To Have Fun) that portrays him as this, but he was under a spell so it doesn't count.
The writers try to give him this trait very very very late in season three.
Early-Bird Cameo: She first appeared in the uncut version of "I'm Dreaming of a White Ranger" released on VHS shortly before her first proper appearance in the "A Ranger Catastrophe" 2-parter, wishing the other Rangers a merry Christmas before they took off to save the North Pole. The scene of course caused some major continuity issues since she was portrayed as a friend to the Rangers and not Rita and Zedd's mind-controlled slave, but Kimberly was still the Pink Ranger. This scene was removed from the broadcast version and all future home video releases, likely because of the major Continuity Snarl it caused.
Ms. Fanservice: She likes to wear shorts and sleeveless midriff-baring tops like Kimberly, but oddly enough seems to have a thing for turtleneck tops. She's even wearing a sleeveless turtleneck top in the Zeo intro.
Big Good: He chose them, he is the overall leader Jason defers to, and he has a history with Rita.
Crazy-Prepared: Power Rangers in Space reveals he had many emergency plans in case something happened to him. Megaforce adds that he also left a pupil back on Earth in case the planet was in great danger and a new team needed to be created.
Oracular Head: He's trapped in another dimension so he uses a device to communicate. It only shows his head.
The Other Darrin: Was voiced by David Fielding until "Calamity Kimberly", when Bob Manahan took over from "A Star is Born" onward.
The switchoff is notably different: Fielding used a terrible, cheap imitation of a British Accent, possibly to make Zordon sound more sophisticated. It's worth noting that Fielding was the one whose head we always saw as Zordon.
Large Ham: Literally—he can grow to fight alongside Megazords and has a larger personality.
Long Bus Trip: Stopped appearing after "The Sound of Dischordia" due to the use of the Orb of Doom in "Rangers in Reverse." Later in "A Zeo Beginning, Part 2," it was stated he was "back in the temple." He hasn't been seen since.
Characterization Marches On: Bulk and Skull were originally the school bullies of Angel Grove High, but as the show went on this aspect of the duo was downplayed and eventually they became more like class clowns.
Let's Get Dangerous: On at least one occasion, Bulk and Skull defeat a monster themselves, after the Rangers themselves are defeated. Nobody believes them afterwards when they brag about it, however.
Relationship Upgrade: A debatable one for Skull's crush on Kimberly. Never brought into canon, but writer Amit Bhaumik said in a 2005 interview that he had wanted to have Kim be married to Skull in the episode "Forever Red" and name Kim as the mother of Skull's son Spike. While unofficial, the idea is popular with some fans and the actors on the show have referred to the relationship when discussing the show with fans.
Smarter Than You Look: In Season 2, they try to discover the Rangers' identities... and most of the times, they are really close, but the Rangers screw up their work.
Skull, of all people, is a classically trained pianist. He's absurdly good at it. Becomes a central point of Character Development between him and Bulk as the big doof initially derides Skull for it, but by the end of the episode, Bulk changes his mind and shows that he can be supportive of him like a real friend should.
Too Incompetent to Operate a Blanket: Bulk once tried to star an ad for a karate dojo and ended up serving as an example of what happens when one tries to learn karate without proper training.
Weirdness Magnet: No matter the Evil Plan, no matter where in Angel Grove the attack is taking place, odds are Bulk and Skull will happen to be nearby when things go down. Their interactions with monsters occurred so often that Lord Zedd knew them by name. This trope was eventually Lampshaded in Season 3:
Lt. Stone: I find it very odd that you two are the only ones in Angel Grove outside of the Power Rangers to face off with a different monster every week!
Skull: Lt. Stone, it's true. Every time we turn around, well (sputters), there they are.
Machiko Soga: came back after finishing Zyuranger to do a few scenes speaking English as Rita so the dubbing would fit better (though it still wasn't perfect). Later, she even redubbed herself to voice Rita for the Japanese dub of the series.
Suffering For Your Art: Voice actor Barbara Goodson was getting jerked around by Saban during pre-production. She was given the part, and told to voice Rita like the Wicked Witch. She did, and was fired. They decided to try to make Rita sound angrier, and rather than let Goodson try, they forced her to reaudition. According to her, she did, and said, "You want angry? [Rita's screech comes out of nowhere] I'LL SHOW YOU ANGRY!" Not knowing she would have to do the part for seven years. She mentioned going through a lot of water and cough drops, and we thank her for suffering through.
Unholy Matrimony: With Zedd. Started out as a power ploy, but grew into something more...
The Dog Bites Back: Throughout Season 1, Goldar was Rita's most loyal sycophant despite her constant verbal and physical abuse of him. Lord Zedd's taking over in Season 2 changed that. Now, given Zedd's Man Behind the Man status, Goldar expressing loyalty to him made sense. However, Goldar also proceeded to mock Rita to her face, claimed that he had always criticized her for her failures and took great pleasure in her dumpster exile. When she came back and married Zedd, he was still noticeably terse towards her.
The Dragon: Rita's most powerful minion and the one who goes out fighting.
Ineffectual Sympathetic Villain: During Season Three and more so in Season 2. At least Season 3 gave him the benefit of some victories (such as beating down Ninjor, which helped lead to his capture). Season 2 saw him routinely defeated in battle, even once by an unmorphed, powerless Tommy.
Demoted to Extra: In the third season, when Rito and Goldar took their place as the bumbing duo.
Note that they essentially served as Rito and Goldar's de-facto minions, which was arguably an improvement. In the second season, all they seemed to do was cower in fear of Lord Zedd or get yelled at by him.
Evil Counterpart: To Bulk and Skull, to the limited extent that one pair is evil and the other is good. Lampshaded by Rita the first time she saw Bulk and Skull:
What Could Have Been: "Goldar's Vice-Versa" wasn't going to be her last appearance, as there were plans for her to return later in Season 2. However, chiefly, the failure to secure the American actress for more than one episode led to abandoning those plans.
The Bad Guy Wins: Zedd accomplished a lot of things when he married Rita, like capture Ninjor, nearly kill Kimberly, allow Rita's brother Rito Revolto to destroy the Thunderzords, blowing up the Machine Empire in the Power Rangers Zeo finale "Good as Gold", just to name a few.
Big Bad: Of the second season and much of the third season. He continued being a Bad in Power Rangers Zeo, but not the Big one.
Body Horror: He has no skin, his brain is exposed and who knows what's behind that face plate. It's been implied that the Zeo Crystal's forcefield did this to him when he tried to claim it.
Evil Cannot Comprehend Good: Some of his schemes involved trying to pit the Rangers against each other or trying to break their spirit by endangering others. His efforts only had the exact opposite effect, which always stunned him.
"I don't understand it. The more I divide them, the more they come together."
Evil Versus Evil: Not in the original series, but, by the time of Zeo, Rita and Zedd are the ones who blow up the Machine Empire.
Executive Meddling: Not of their own choice but parents found Zedd to be too scary at the start (who could blame them, in the introduction in addition to his appearance. The guy had a snake wrapped around his arm.) Thus, the producers had to tone him down later to make him more of a laughable villain. It wasn't too much to dampen his character as he was still a force to be reckoned with however.
Large Ham: Example from The Movie: "After two thousand years of searching... it is FINALLLY within my grasp! AND NOW... LET'S CRACK THIS EGG!" All the while he gestures with his staff and times its contact with Ivan's egg-prison with the final word.
The Man Behind the Woman: At the start of Season 2, it was revealed that Rita answered to Lord Zedd and was charged with conquering Earth for him. Her failure led to him taking a more direct role.
Nightmare Fuel: He freaked kids out when he first appeared in 1994... and considering that he was a skinless, brain-exposed, deep-voiced megalomaniac who kicked Rita out of the series in five minutes, it's no surprise why.
Orcus on His Throne: This trope goes for any Ranger Big Bad, really, but it becomes really evident when (as noted above) Zedd effortlessly clobbers Tommy.
Original Generation: Zedd has no Sentai counterpart; he was an entirely American concept to help spruce up the show in the second season. It worked.
The Dreaded: His introduction to the Rangers says it all.
Dug Too Deep: The Egg he was sealed in was unearthed by a construction crew.
Eviler than Thou/Evil Is Not a Toy: After destroying the Commander Center, he announces that he's taking over Rita and Zedd's operation. When they disagree, he shrinks them and traps them in a snow-globe.
Large Ham: He is probably one of the most deliciously hammy villains the series has had; he takes on a persona and he plays Evil Is Hammy for all it's worth. It's clear Paul Freeman had a blast playing him.
"From this moment forth the world as you know it as shall cease to exist! WELCOME TO MY NIGHTMARE!" (Beam away in purple light)
Psychic-Assisted Suicide: He takes control of the minds of Angel Grove's adults, who are then commanded to "leap to their doom" into a massive hole on a construction site. Bulk and Skull rally the kids to save the adults as the Rangers battle Ooze, with one of the kids holding them back with a water cannon, but it's not until Ooze's demise that his spell is broken and the adults are returned to normal.
Sealed Evil in a Can: "Do you have any idea what it's like to be locked up in a rotten egg for 6,000 years? It's BORING. Not to mention I've had a Charley horse since the Renaissance..."
Enigmatic Minion: Rita refers to him as "heavy artillery", and Baboo claims he nearly wiped them all out the last time she summoned him, but other than that he's basically the guy Robert Axelrod played before Lord Zedd.