Psychic Squad is quite full of Shout Outs; not at Ghost Sweeper Mikami levels, but Shiina is getting really good with this trope. Often enough, the reference is lampshaded pretty heavily too.
- Kaoru wants to purchase a toy in one episode that resembles Haruhi almost exactly. Considering who Kaoru is voiced by, this doubles as an Actor Allusion.
- Much later, we have this scene◊. Also doubles as an Actor Allusion.
- "Psychic Endless Eigh-"◊
- There's even a Shout-Out to Detroit Metal City when Kaoru shows up in a Krauser mask.
- The best shout out is chapter 126/episode 46, where a notebook that can change the future launches the cast into a Death Note homage, starring Sakaki as L.
- Further on, Death Note appears again in the form of the Children copying Light's various methods for hiding the note pages. Results in a Gambit Pileup.
- Kaoru uses Light's method for hiding her diary.
- There's a Sayonara, Zetsubou-Sensei spoof at Minamoto's marriage interview and a JoJo's Bizarre Adventure one in the manga version.
- In the manga, the spoof is in a dream sequence.
- In the manga, Fujiko wears C.C.'s 'suit' at one point. Also an Actor Allusion.
- A yonkoma gag strip has Kyosuke cosplaying as Bleach's Gin Ichimaru. Also an Actor Allusion.
- Another one has a Haruhi reference where he asks espers to join him.
- A small subtle one in the Anime, Kaoru's Pyschic Shield (probably most clearly seen in episode 7) is identical in shape, colour, and style to an AT Field.
- The picture here◊ is similar to a scene from Project A-ko.
- In the anime, Animorph Hatsune can morph into a Bowdlerized version of Sirene.
- Sakaki is a doctor who detests the Japanese medical hierarchy ''and'' wields scalpels as weapons.
- Kaoru gets a hat and accompanying outfit.
- And here the girls freak out a la Kazuo Umezu.
- Carrie, a purely psychic alter-ego/bodiless twin of Minamoto's ex.
- Fujiko uses Dio's 'pieces of bread' analogy for all the lovers she's had.
- To Love Ru: when Lala's here◊, you know fanservice is not far!
- In the manga, the Voight-Kampff test is used to identify espers and gauge their Power Levels.
- Incidentally, the blaster issued to Minamoto bears a striking resemblance to Deckard's gun.
- Kaoru's sister cosplays Hatsune Miku.
- In another omake, Ninja Hanzo has a Sharingan.
- In episode 30, the K-drama that Kaoru was referencing and had Fujiko in tears was Winter Sonata.
- Minamoto's Training from Hell in episode 46/chapter 122 is clearly inspired by Full Metal Jacket, the animé episode has even a Gunnery Sergeant Hartman lookalike addressing the trainees as maggots and them responding "Sir, yes, sir!" in English.
- Chapter 272 shows PANDRA's senior members in a dogfight with a boy flying on a broomstick with glasses and lightning shaped scars on his face who uses a wand to cast a "Spell of Death" in the skies above London.
- Possibly unintentional, but it seems that Dane Cook's wish for a guy who can shoot lasers out of his crotch has finally come true.
- Episode 5 of The Unlimited has Lupin III in a police uniform, The Nostalgia Critic, and The Angry Video Game Nerd as random spectators. This didn't escape the notice of Doug Walker, or the notice of fellow Channel Awesome contributor JesuOtaku.
- Kaoru channels Oscar during an Imagine Spot (with Minamoto becoming a very weepy Andre).
- Hayate and Nagi can be seen and heard very briefly in episode 9 as the girls and Minamoto are leaving the shopping center. He is also seen walking in a crowd with Tama, Nagi's pet tiger, in episode 18, shortly after Chisato ditches Kaoru spying on Aoi's date.
- Kaoru sees him briefly again in episode 26 with Nagi, who's trying to get a kiss from him.
- Nagi and several of the other girls are visiting the same park that the girl's class trip is on in episode 33. Hayate isn't there at that particular time, but he shows up at the very end to encourage Minamoto after everyone leaves him during what looks like an interrogation.
- In episode 10, Aoi teleports survivors from a sunken ship on their super-submarine while ATATATATATATATATATATATATATATATATATATATATing.
- In episode 19, one of the biker club members looks like the leader of the Clown biker gang from AKIRA.
- Shout-Out Theme Naming: Most Japanese characters' name are driven from The Tale of Genji.
- Minamoto is based off the titular protagonist's name after banishment, Minamoto. Alternatively, the kanji for "Genji" can also be read "Minamoto" .
- Kiritsubo is based from the Emperor Kiritsubo, Genji's father.
- Fujiko is based from Lady Fujitsubo, one of Kiritsubo/s concubines.
- Aoi is based off Genji's first wife Aoi no Ue.
- Shiho's surname is a giveaway to another of Genji's wife , when the kanji for "shi" in her name can also be read "murasaki", referencing Lady Murasaki.
- Kaoru's surname is a reference to the Lady of Akashi, when her given name is a nod to Genji's another son from another wife.
- Oboro's last name is after Kashiwagi, the eldest son of To no Chujo; her first name is for Lady Oborozukiyo.
- Sakaki's name is a based from the 10th chapter of the Tale Of Genji, Sakaki.
- Natsuko's name references the chapter "Tokonatsu" (常夏)
- Hotaru is named after two chapters ,"Nowaki" (野分) and "Hotaru" (蛍) . Also, the character Hotaru, was Genji's half-brother.
- Naomi's last name is for the chapter "Umegae" (梅枝)
- Tanizaki Ichiro is named after Tanizaki Junichiro (谷崎潤一郎), an author who translated The Tale of Genji into modern Japanese.
- Akira's last name is after the chapter "Yadorigi" (宿木)
- Hyobu is named after Prince Hyobu, the father of Murasaki in The Tale of Genji.
- Momiji is named after the chapter "Momiji no Ga" (紅葉賀)
- Yo Fujiura is based from the 33th chapter of The Tale of Genji, Fuji No Uraba.
- Mio is named after the chapter "Miotsukushi" (澪標)
- Koremitsu Yamada is named after Koremitsu, a Genji's retainer in the novel.
- Chisato is named after the chapter "Hana-chiru Sato" (花散里); also the character of the same name, a lover of Genji .
- Masaru is named after To no Chujo (頭中将), Genji's best in The Tale of Genji.
- In volume #2 chapter #4, a random thug on drugs is shown ORAORAORAORA-ing a store window.
- In the manga, Muscle Ookama was first introduced as "Full Muscle Alchemist" (likely because of his superpower of petrification of others and himself (he can harden his skin to protect himself and to increase his offensive power)).
- Tim transforms the plane he captured during his fight with the Children in a plane-robot combination just like the one from the Macross franchise.
- When they were fighting about an reality-warping notebook, Shiho yelled that she'll use the notebook to "be the god of the new world" (this notebook was modelled very closely after the Death Note, Sakaki even imitates the pose and clothing of L when analyzing this notebook and the animation style of the episode shifted into something resembling the Death Note animße from time to time).
- In a later chapter, it's Kaoru who does a Light Yagami impression by parodying his famous lines (the ones about being a god of the new world and creating an ideal world for good people).
- Tim's puppet of Shiho has flying devices in her legs that look exactly like the magic flying engines from Strike Witches.
- An afterimage of an esper lets out Dio Brando's battle cry "MUDA MUDA MUDA MUDA" ("USELESS USELESS USELESS USELESS").
- In a semi-canonical omake the esper dolphin #008, an colleague of #009 (Igou) predicts the success of franchises around "a boy robot with 100,000 horsepower", "a boy detective", "a pirate" (possible One Piece), "a blue cat robot" and "a yellow electric mouse".
- Shiho told an esper art thief to "make her day" while shooting him with a stun gun.
- There's a parody of the cat-eared bus from Kemono Friends on the cover of chapter #488.
- Chapter #492 has Fujiko as the evil witch from Snow White because Black Phantom brainwashed her into being their minion.
- The cover of chapter #503 has the Bond Gun Barrel with Tim Toy.
- Show Within a Show: Zettai! ChilChil and the Gundam mashup God Robo.
- Kiritsubo tries to wake up Tsubomi by ORAORAORAORAORAORAORA-ing against the door of her room.
- The organization name B.A.B.E.L. is an homage to Babel II. The given name 'Koichi' of Minamoto might be a Shout-Out to the real name of Babel II, 'Koichi Yamano'. The Big Bad Kyousuke Hyoubu's trait as a near omnipotent ultimate esper who wears the black Japanese school uniform ('gakuran') is also taken from Babel II. In manga, there is a brief comedic scene in which two unnamed drunken espers who strikingly resemble Babel II and Yomi respectively fight each other with petty psychic powers.
- The author once serialized the comic adaption of Ultraman Nexus in the kiddie magazine ran by the same publisher as this manga, but had to pull the plug earlier than planned because of the series' cancellation. He inserted two easter eggs for the series in this manga to show his pity for the cancellation when he got the chance: 1) The gas station that resembles the one featured in the first episode of the series made appearances in the background of the manga, with the signboard says 'Nexus'. 2) The cast of the comic adaption made a brief cameo appearance in one chapter as the guests in the bar where the heroes visited to look for a person.