乁(´• ω •`)ㄏ
Old man

Dr. Kleiner as seen outside of SuperMarioGlitchy4's videos.

Dr. Isaac Kleiner is a Caucasian American old man scientist from the Half-Life video game series. He appeared in a few recent videos of SuperMarioGlitchy4 released in the year 2014.

Physical Description Edit

Dr. Kleiner is a rather tall old man, he has a gray hair and is partially bald. He wears a white shirt marked with the green word "dsb", dark jeans, black shoes and also black glasses. In the video "Ssenmodnar 6.64 (100k special QNA Edition)", his glasses have blue lenses, and in the episode "SwagQuest", he wears a brown hat after Luigi tells him he looks ridiculous (see below).

Appearances in SuperMarioGlitchy4's videosEdit

Dr. Kleiner is a recent and minor character in SMG4's bloopers. He first appeared in 2014, and only in a few videos.

Ssenmodnar 6.64 (100k special QNA Edition)Edit


Dr. Kleiner in front of SMG4's computer in Ssenmodnar 6.64. His glasses have blue lenses.

This is Dr. Kleiner's first appearance in SMG4's bloopers, in this video he appears in the last skit of the video (#15) as a nerd who is revealed to have been watching the video up until this point, and says it really sucks, not knowing SMG4 is right behind him. Eventually, SMG4 gets pissed, and tosses the nerd out the window.

%99% Beroken Edit

In this blooper, Kleiner makes a cameo appearance in Mario's mind, in which he's near a flying carpet, while Mario is on this last one and screams "What is happening?!".

Sonic the Derphog: Eggventure (GET IT!?) Edit

In this other episode, Kleiner appears as a news reporter on "Humans News" on a large television to whom Sonic is watching after this last one found it, in Human City. Kleiner reports that an alien (Dr. Eggman) has landed in Human City.



Dr. Kleiner ready to fight Luigi in SwagQuest. He's wearing a brown hat after the green plumber tells him he looks ridiculous.

This is Kleiner's most prominent appearance in SMG4's videos. In this blooper, when Luigi is not allowed to go to Mario's party because he doesn't have enough swag, he seeks lessons from Bowser on how to obtain swag. After a few minutes in the lesson, Bowser tells Luigi to change his clothes, to add swag. After four clothes changes, Luigi and Bowser settle on a gangster costume. Then, Dr. Kleiner runs up to Luigi and slashes his clothes off with his crowbar, causing Bowser to force Luigi to fight Kleiner, stating that he "ruined Luigi's swag". Luigi is afraid at first, but gains the courage to the old man, telllling him "You look ridiculous". Kleiner then gets angry and Luigi starts rapping. The old man reminds him that this is a fight, and a short battle ensues. The old man strikes Luigi with a Smashball, who counterattacks with a "Big Gay Dance." Kleiner man then throws a fireball at Luigi, who ducks as it ricochets off a tree, blasting the old man into the air and causing him to crash into a boat, which sinks as Luigi does a short victory dance. Dr. Kleiner possibly died under the sea, as he never reappeared in SMG4's videos since.


  • His name is never mentionned in SMG4's bloopers, he's only referred as "Old Man" in the episode "SwagQuest".
  • He's always calling "Hippie" to Luigi in the video "SwagQuest".
  • He's always carrying a crowbar, except when he's in fight with Luigi, still in the episode "SwagQuest".
  • Dr. Kleiner's model is used in another internet series, Elliot goes to School, as Mr. Higglesworth. On a related note, in his Ssenmodnar 6.64 appearance, he uses voice clips from Wesley/Xavier 3.10, a major character from Elliot goes to School.
  • Despite being old, he seems to have a lot of energy in SMG4's videos. In fact, several characters, often old, are apparently stronger in SMG4's bloopers than everywhere else, like Dumbledore from the Harry Potter series, who appeared in the video "Spells n' Wiztards" for example.

Important noteEdit

When Dr. Kleiner is referred as "Old Man", he mustn't be confused with the Old Man (Hobo?) from the video games Pokémon FireRed and Pokémon LeafGreen for the Game Boy Advance, and also with the Old Man who appeared in the blooper "Cooking with Bowser and Mario 2!" in the part "How to cook: Raisins?".

Main characters
Mario · SuperMarioGlitchy4

Major characters
Bowser · Luigi · Princess Peach · Steve · Toad · Waluigi · Wario

Recurring characters
Dr. Mario · Lakitu · Policemen · Narrator · Old Man Hobo · Rocks · Shy Guy · SuperMarioGlitchy3 · Teletubbies · Weegee · Yoshi

Other YouTubers
AustinDawgyDawg · CrimsonMan5 · DatVoiceGuy · DannyPhantom911 · EpicYoshiFan · FightingMario54321 · GageDawg · Geofcraze 634 · Hitkid96fan · Kw977 · LegoGuy77777 · Lilyncookies · MarioMario54321 · MarioMario761 · MarioStar92 · MejiaCantilloGustavo · Megaman765 · Nintendofan997 · Oscarm00 · PhazonMario · Pinkolol16 · Roprinplup14 · Ruffman8890 · Schm2000 · Starman3 · SuperMarioFan590 · SuperMegaUltraSonicX16475 · Superstarxalien169

Minor characters
Baby Luigi · Baby Mario · Ben · Big Bully · Bob-omb · Boo · Bonnie the Bunny · Bot · Bowser Jr. · Bully · Chain Chomp · Chica the Chicken · Chuck-ya · Crazy Chinese Guy · Crazy Toilet Dude · Daisy · Derpy the Mailman · Donkey Kong · Dr. Kleiner · Dumbledore · Eyerok · Female Steve · Frankie · Freddy Fazbear · Foxy the Pirate Fox · God · Golden Freddy · Good Star · Goomba · Gourmet Guy · Hagrid · Harry Potter · Heavy Weapons Guy · Hello Kitty · James Doakes · Jigglypuff · John · John Geyham · Justin Bieber · King Bob-omb · Kirby · Koopa Troopa · Link · Luma · Mad Piano · Mario Head · Notch · Professor E. Gadd · R2-D2 · Ronald McDonald · Rosalina · Samus Aran · Shrek · Shy Guys · Spike · Stacy · Toad Barrage · Toad Birds · Toad Guards · Toad Priest · Toadette · Toadsworth · Toadwardo · Villager · Wizard · X · Ztar

One time characters
Alex and Derrick · Bandit · Barbie · Barbie's son · Batman · Bill Cosby · Bobby · Bowser's Boss · Bowser's Mom · Buzz Lightyear · Brains · Bully Boss · Cap'n LardButt · Captain Steve · Colonel Sanders · Conker the Squirrel · Crazy Japanese Guy · Cube the Penguin · Don · Dorito Guy · Driving Guy · Enderdragon · Game Reviewer · Gay Luigi · Giant Mario · Goombs · Guy (0% of Spaghetti) · Blue Guy · Hall-9000 · Herobrine Persson · King Pipe · Mario's 4 emotions · Mario's Camel · Mario's Conscience · MarioMario54321 X · Mike · Miss Tubby · Miyamoto's Ghost · Mr. Toilet · OiramOiram12345 X · Omochao · Pedobear · Pipes · Prince Big Whoop · Prince Steve · Princess Peach Robot · Queen Stephe · Ragnarok · Robotnik Horse · S.M.G Club members · Scatman John · SMG1 · SMGDJ · Slenderman · SuperLuigiGlitchy4 · SwagTubby · The Bomber · The Imposter · The Spaghetti Fairy · Toad Babeh · Toad Bravo · Toad Bewbs · Tubby Bison · The Tubby Custard Salesman · Tubby Chef · Tubby Wonka · Trevor Phillips · Woody · Virus · Y

Guards N' Retards characters
Main: Chris · Swagmaster69696969696
Other: Agent Biker · Butt Ninja · Crazy Woman · Greg · Morgan Freeman · Pointy Boob Lady · Reymon D. Gai · Sergeant Mark · Tubbie Wonka

Super Pokeman 64 characters
Gary "DICKS" Oak · Pikachu · Professor Oak

Sonic the Derphog characters
Main: Dr. Eggman/Robotnik · Sonic
Other: Amy Rose · Dr. Tubby Robotnik · Eggbot 2000 · Miles "Tails" Prower · Omochao · Shadow the Hedgehog

Real Life SMG4/Luke Lerdwichagul