- The first time Berry lays eyes on Bloo in Foster's Home for Imaginary Friends she goes wide-eyed and sees Bishie Sparkle around him. So begins her Yandereriffic love for him.
- Avatar: The Last Airbender:
- It's implied, and later confirmed by 'Avatar Extras,' that Aang fell for Katara when he first saw her after being freed from the iceberg.
- And Sokka for Yue, though that may very well have been mutual.
- Avatar Kuruk fell in love with Ummi at first sight, and Avatar Roku falls in love with Ta Min the same way.
- The Legend of Korra:
- According to Shiro Shinobi, Korra fell in love with Mako the moment she saw him.
- Bolin explicitly tells Korra he fell for her the moment he saw her. The first time we see him was him spotting Korra across the room and smoothing back his hair, and immediately after he walks up to her he starts implying to Toza that they are a couple (which Korra is quick to correct).
- Mako falls hard for Asami within seconds of their Crash-Into Hello, as communicated by cartoon heart bubbles.
- Ultimately deconstructed. None of the above relationships work out by the end of the series and each pair remains platonic partners. The only relationships that do work require work to keep it that way (Bolin and Opal) or build up based on preexisting, strengthening emotions that eventually become romantic (Asami and Korra).
- In The Raccoons, Bert instantly falls for Lisa the instant he sees her. However, when he makes his big play professing his love, Lisa, caught off guard of a new friend going way too fast, unsuccessfully tries to gently cool his romantic aspiration for someone he just met. However, when she returns home, troubled at upsetting Bert, writes an affectionate letter later which lifts his spirits with the implied promise of a relationship that can develop in its own time.
- The Fairly OddParents!: Vicky and Ricky fell in love pretty quickly, but then again, Timmy wished for the perfect man for Vicky.
- Plus the relationship fell apart by the end of the episode, with a definite implication that he never really loved her anyway. They are teenagers, after all.
- In the episode "Love at First Height", Timmy wishes to be a 16-year-old so he can ride on an Adrenaland roller coaster, unbeknownst to him that he sits right next to Vicky, who falls in love with him the minute she sees him. When she asks for his name, Timmy yells "Gah!" in shock, and he later becomes known as Gah the Norwegian supermodel, not to mention that everybody else in Adrenaland (including his friends and family) had a craving for him.
- Kim Possible on Eric in Kim Possible Movie: So the Drama. Well, she needed anyone except Ron (because of the rules) and Eric was a drone made to let Kim fall in love with him.
- It's implied that Ron's feelings for Kim stem back to their childhood, possibly when they first met back when they were in preschool.
- Kipo and the Age of Wonderbeasts: Benson immediately falls for a boy in the second burrow after seeing him, and especially when they share a taste for the same music.
- Code Lyoko: Heavily implied with William, who shows a keen interest in Yumi from the first day he knew her, and later claims that he's always been in love with her.Sissi: Have you been crazy about Yumi for a long time?
Sissi: You've only been here for a couple of months!
William: Don't you believe in destiny with a capital D? Two people who have never met, but are made for each other?
- Discussed in The Simpsons episode "The Two Mrs. Nahasapeemapetilons" prior to Apu's Arranged Marriage:
- Apu: Manjula and I have not seen each other for 20 years. Two people cannot fall in love, sight unseen.
Moe: Hang on there. I'm counting in that.
- As shown in the episode "The Way We Was," Homer fell for Marge the first time he saw her.
- On Jimmy Two-Shoes, Beezy and Saffi fall in love the moment they see each other.
- Happens when Ferb sees Vanessa for the first time in Phineas and Ferb. Isabella to Phineas (although we don't know when it happened) is possibly the same case.
- One of the Ork bikers asks this to Velma in Scooby-Doo! Mystery Incorporated after she fixes one of their bikes. Velma, being the Deadpan Snarker, bluntly tells him that she doesn't find him attractive.
- Hey Arnold!:
- The first time Helga truly meets Arnold at the age of three outside the Pre-K as he holds an umbrella over her head. Justified, as she puts all of her emotions and neglective parent's behavior into this one act of kindness. Word of God, however, states that they're meant to be.
- In "Arnold Visits Arnie" during Arnold's Nightmare Sequence Lulu falls in love with Arnold at first sight and so does Hilda with Arnie.
- My Life as a Teenage Robot: One-shot villain Little Acorn in the episode "Puppet Bride", who falls in love with Jenny at first sight (he sees hearts and sparkles around her upon seeing her) and tries to force her to become his bride.
- Pepé Le Pew often falls in love at first sight with another animal so long as they have a white stripe down their back, most often towards Penelope Pussycat.
- And Fifi La Fume of Tiny Toon Adventures often did this to animals of the male variety, most notably to Furrball in the episode "Aroma Amore". Furrball himself seems to experience this upon meeting Fifi, but completely loses interest upon seeing her skunk stripe and picking up her scent.
- KaBlam!: Henry for Dawn, a one-shot character from the episode "A Nut In Every Bite". Dawn is the granddaughter of Mr. Stockdale, who comes from Switzerland to visit the show. Henry falls for her almost immediately (much to June's dismay), but she doesn't quite share the love. However, he does manage to charm her... by hurting himself. At the end of the episode, Dawn goes back to Switzerland, but by this point Henry is actually relieved (he's hurt himself so much he's covered in casts and bandages, and bound to a wheelchair).
- Played with and blown to smithereens in Invader Zim with the advent of Tak (the not-so-hideous-new-girl), who manages to both endear herself to Dib and (accidentally) convince Zim she's in love with him. Cue Falling In Love Montage with Zim courting Tak, only to be violently rejected. Turns out, she's a much-more-skilled Irken who's vowed revenge on Zim (and completely hates him). Naturally, she and Dib can't be friends either.
- In the 2012 Teenage Mutant Ninja Turtles cartoon, Donatello falls in love with April O'Neil the instant he sees her.Donatello: She's the most beautiful girl I've ever seen.
Raphael: Isn't she the only girl you've ever seen?
Donatello: My point still stands!
- My Little Pony: Friendship Is Magic:
- Although it's presented in a low-key way, it's pretty clear in Paperman that the man and the woman are smitten within seconds of seeing each other. The ending sees them happily getting to know each other in a café.
- In Winx Club, two villains, Icy and Tritannus, meet each other in the prison of Andros. The two are instantly enamored with each other. Icy likes how Tritannus tried to assassinate his brother in order to become crown prince and Tritannus feels that Icy is the only one who gets him. When they break out, the two decide to take over the Magic Dimension together and become emperor and empress.
- One example from each generation of campers in Total Drama: Gwen and Trent in season 1 and Zoey and Mike (especially from Mike's side) in season 4.
- In the ChalkZone episode "The Crush", Rudy develops a crush on Queen Rapsheeba's creator, Trina, as soon as he sees her for the first time. Complete with a chorus singing, "Love at first sight!"
- Also happens to a lesser extent at the beginning of "Rudy's Story" when Rudy is watching Penny give her "What I Did On My Summer Vacation" report in front of the class, and is clearly shown to have a crush on her.
- Steven Universe frequently address the concept, but always denying that it is ever as simple as actually being love at first sight. Every time the characters think they have fallen in love easily it is revealed that they had no idea what they were really getting into.
- In the episode "Love Letters", Jamie is rendered speechless at the sight of Garnet emerging from the ocean and writes her a letter proclaiming his love and asking her out. Garnet turns him down—bluntly—and explains that love takes time and work and that love at first sight doesn't even exist. You need to know one another, and Jamie literally has no idea who (Or what) Garnet is.
- A flashback episode reveals that this is how Greg Universe and Rose Quartz met, but a different flashback episode deconstructs that. After getting together the two of them have fundamental issues because of how different they are, and they need to spend time understanding what they mean to themselves and each other before they can be happy together.
- "Last One Out of Beach City" has Pearl struck senseless by the 'Mystery Girl' when she walks into the same room, and she is so overcome that she is awkward and clumsy. However, in the next scene Steven—in a panic—points out how the Mystery Girl looks an awful lot like his mother, whom Pearl has spent millennia working and devotedly in love with.
- Doug fell in love with Patti the moment he saw her.
- In The Saga of Windwagon Smith, Captain Smith is so love-struck when he first sees Molly Crum, the mayor's beautiful daughter, he absent-mindedly takes a bite out of his plate.
- Quack Quack and Eugly from Kaeloo fell in love with each other the moment they saw each other. In a very short time, they become an Official Couple.
- In Voltron: Legendary Defender Pidge finally finds her brother, Matt, and when he is brought to the castle, he's instantly fallen for Allura. Even his vision turns heart-shaped.
- Stitch falls in love with Experiment 624, also known as Angel, in the Lilo & Stitch: The Series episode "Angel" when he first meets her face-to-face. She actually intended for him to react this way so she could use him to find reformed experiments and convert them to evil, but Love Redeems as she develops feelings for him in return over the course of the episode.
Love At First Sight / Western Animation