Bulk and Skull are fictional characters in the Power Rangers universe. They appeared as permanent cast members from the original series of Mighty Morphin Power Rangers until Power Rangers: In Space, and Bulk by himself was a regular in Power Rangers: Lost Galaxy, making the pair the two longest-appearing characters in the program.
Farkas "Bulk" Bulkmeier (Paul Schrier) and Eugene "Skull" Skullovitch (Jason Narvy), from the very beginning, provided much of the comic relief in the series, usually through over-the-top slapstick (often accompanied by a suitable soundtrack, including background music). This was no doubt highlighted by their physical appearances: Bulk was heavyset and Skull lean. Similar comedy duos have appeared in other works to similar effect (see Laurel and Hardy). Bulk was the dominant member of the duo, and Skull would usually follow and attempt to emulate Bulk. Such is exemplified when Skull would repeat whatever Bulk had said, usually beginning with "yeah".
During the second season, they attempted to discover the secret identities of the Power Rangers and repeatedly failed, eventually giving up by the time of the episode "A Friend in Need". Ironically enough, they did discover the Rangers' identities twice. Once, they saved the Rangers when the Ranger team lost their memories and de-morphed in front of them - Bulk and Skull tricked the Scatterbain monster to fire his amnesia beam through a prism, distorting the beam and restoring the Rangers' memories. Unfortunately, Bulk and Skull lost their short-term memories in the process due to being flung back by the amnesia beam and landing on their heads. The second time, a psychic pointed the Ranger teens out to Bulk, but he didn't believe her as they were holding a picture of the morphed Ranger team at the time just given to them by Ernie. They would eventually learn the identities of one set of Rangers, along with everyone else, several years later in the Power Rangers in Space finale (with which they could eventually figure out every past Ranger, too).
Often, the duo got themselves mixed up with some of the villains' schemes. In Green With Evil Part IV, the two tried to flee the city in a bus, but were taken hostage by the giant Goldar. The Power Rangers had to summon the Megazord to save them from being thrown over a cliff. In The Wedding, when they went to Australia with the Rangers for Spring Break, Alpha 5, who was under an evil spell, sent them to the outback, where they encountered Australian wildlife up close. After Alpha recovered from the spell and sent them back, they decided that if anyone asked, "nothing happened!" In the following episode, Return Of The Green Ranger Part I, the Wizard of Deception brainwashed them into going to get a lock of Tommy's hair, but failed miserably. The Wizard angrily put them to sleep.
Skull had a crush on Kimberly, and Bulk appeared to want to win Trini's heart, as well, in a few episodes. Whenever the girls were with the four other Rangers, however, they referred to the girls and the guys as "nerds" and "geeks" (despite the fact that Kimberly originally appeared to be ditzy and materialistic, not intellectual), and occasionally "dorks" and "losers", as well, among other insults. This group of demeaning insults and namecalling would eventually turn against them by the time of the episode "A Friend in Need", when two teenage girls call them as such throughout the episode. This was later explained by Paul Schrier himself as the two being angry at the world and jealous of the five teens, hence the namecalling, shoving, and bullying that they originally did.
A popular change of direction for the duo occurred in the third season of Mighty Morphin Power Rangers, when they joined the Angel Grove Junior Police Force and first met Lieutenant Stone. Lt. Stone became a permanent character himself, frequently giving Bulk and Skull orders that they failed to perform, leading eventually to his anger (rather than their humiliation). Despite this, Bulk and Skull were close to Lt. Stone and became more likable characters, changing from stereotypical bullies to good natured goofs.
When the movie ends with a celebration in the Angel Grove harbor, thanking the Power Rangers for saving the world, although Bulk and Skull complain that it was themselves who saved the day.
Bulk and Skull are regressed against children due to Master Vile's Orb of Doom, and act like the bullies they were in the first season. Bulk is briefly turned into the "Brat Boy" monster by Rita and Zedd during the course of the mini-series and battles the Aquitian Rangers, but soon rebels against his masters as his human self surfaces from within, prompting Rita and Zedd to return him to normalacy in retaliation.
Paul Schrier directed a "Mighty Morphin Alien Ranger" episode "Attack of the 60' Bulk", which he also appeared in briefly, despite his character at the time being reduced to the age of a child. Schrier (under the name of Paul Schrier II) had also directed a few episodes of Power Rangers: Turbo during the first half of the season (while his character of Bulk was a chimp).
In one episode, Skull shows he is an adept classical pianist by playing Chopin's Revolutionary Etude. While Skull enjoyed classical music it was something of a hidden shame behind his tough guy facade. Fearing ridicule, he long kept his talent hidden even from Bulk.
Zeo concluded with Bulk and Skull accepting an offer to work for an agency in France on a top secret mission, and depart much to the dismay and frustration of Stone. This major plot point was dropped without explanation in between Zeo and filming of Turbo: A Power Rangers Movie.
Bulk and Skull remain chimpanzees for several episodes. They are voiced by the actors who play Bulk and Skull, however only the audience can understand them. Jerome Stone takes the chimpanzees into his care (claiming that they seem 'familiar'), and they make several attempts to inform him of their true identities.
They are eventually transformed back into humans, but a temporary side-affect turns them invisible. This state only lasts for a few episodes until they finally return to normal and attempt to take on proper jobs (Jerome Stone arranges for them to get a new one in most episodes) ranging from pizza delivery to construction, which they always get fired from.
They were transformed into monkeys so Narvy and Schrier would have time to work on a proposed spin-off series for the characters which would have seen them operate a hotel and feature El Vez, the "Mexican Elvis", a local personality in Southern California. The attempts never made it to a final production and the actors returned full time to the series.
NOTE: in episode "The Darkest Day" wants talking Bulk says monsters are Pudgy Pig, Eye Guy, The Peckster.
The best transformation and growth of Bulk and Skull's characters is shown in the climax finale, "Countdown to Destruction". Towards the end of that episode, Astronema's forces have conquered Earth. She asks rounded-up citizens of Angel Grove where the Rangers are - getting no response, she prepares to attack the citizens. Before she is able to do so, Bulk & Skull are the first of the civilians that claim to be Rangers to buy the real team some time. A minute or so later, when Astronema doesn't buy the ruse, the real Rangers teens show up, and breaking with tradition, morph in front of everyone, showing their identities to the world. They begin to fight the hundreds of Quantrons and Piranhatrons in the area.
At this point, Bulk can't stand to see the Rangers he adores against these odds, so leads the citizens of Angel Grove in a fight for their city, and everyone joins in fighting the monsters alongside the Rangers. The cry for everyone to "get in there" to fight alongside the Rangers is widely seen as the finest hour for Bulk and Skull's characters.
Bulk and Skull were shown as servers and managers of a tropical-themed bar called "Bulkmeiers". Tommy Oliver, the former Power Ranger, is also present. In this episode, Bulk and Skull were shown having a conversation about the early days of Power Rangers - in particular, Bulk is bragging to Skull about how he once saw Lord Zedd and Rita Repulsa, despite the fact that Skull saw them also.
Interestingly, they seemed afraid of disturbing the resting Tommy, to a degree indicating both respect and fear of something greater than martial arts, suggesting that they had learned of his identity as a Power Ranger by this time.
It was considered that Skull would have married Kimberly Hart, with whom Skull held a long time crush, by this time. However, this idea was shelved by production.
This was their (to date) final appearance on any incarnation of Power Rangers. Between the Lost Galaxy and Wild Force, Schrier was still involved with the PR Crew, voicing Infinitor in Power Rangers: Lightspeed Rescue and Severax in Power Rangers: Time Force.