The story centers around a girl named Hazel who develops a crush on Almond, a Pokémon Trainer from whom she is constantly rebuffed. To receive a Love Potion from a scientist named Grandpa and thus gain Almond's affection, Hazel agrees to catch Pokémon for his research.
This series chronicles Hazel's attempts to make Almond like her, as well as her friendship with several Pokémon she meets — mainly Pikachu, Clefairy, and Jigglypuff (Pikachu, Pippi, and Purin, for whom the series was named) — and her rivalry with Grandpa's granddaughter, Coconut. Gradually, the focus of the series shifts away from collecting Pokémon and more to the relationship between Hazel and Almond, as well as the relationships between other human characters, between Pokémon, and the friendships of both humans and Pokémon.
Tsukirino also wrote a sequel entitled Pokemon Chamo Chamo Pretty, which is a very loose adaptation of Pokémon Ruby and Sapphire. Both series are complete.
This manga provides examples of:
- Affectionate Parody: Of many aspects of the Pokemon franchise.
- Attack of the Town Festival: In "Panic at the Cherry Blossom Festival!!", a very drunk Dodrio goes on a rampage at a cherry blossom festival the main characters are attending.
- Beware the Quiet Ones: Clefairy's Metronome is extremely powerful and can send characters flying. He's just too scared to use it normally.
- Butt-Monkey: Being a slapstick comedy series, everyone though Eevee, Almond and Walnut are the standouts.
- Cooking Duel: One occurs between Brock and Jigglypuff in one of the anime crossover comics.
- Christmas Cake: Cashew, although by the end of the chapter she seems to not mind so much.
- Distress Ball: Hazel gets thrown this in "Clefairy Comes Through." When Arbok tries to attack Hazel, she needs Clefairy to save her despite the fact that she's wearing her invincibility clothes.
- Double Standard: Rape, Female on Male: Zigzagged in a PG variant. Hazel constantly attempting enchant Almond over loving her is never looked down upon, but that doesn't mean she receives no repercussion from them. She grows out of it and luckily never succeeds.
- Double Standard: Rape, Sci-Fi: Subverted. Hazel tried to win Almond's heart by trying to feed him various Love Potions, but it results in nothing more than amusing slapstick comedy (like when the potion blows up on her face).
- Dub Name Change: Marron → Hazel, Peas → Peanut
- Edible Theme Naming: Many of the characters (Hazel, Almond, Coconut, Peanut, Pistachio, Walnut) are named after nuts. A few of the other characters (Ginger, Apricot, Plum, Caraway) are named after foods other than nuts.
- Fairy Tale Episode: Volume 3 has a series of 4komas where the characters are placed into different Japanese fairy tales.
- Flower from the Mountaintop: Happens twice in the series. The first is in "Party Time!" where Jigglypuff attempts to get a giant flower off the side of a cliff and fails. The second occurs in "Apricot's Valentine," where Walnut, Almond, Pikachu, and Marimaru get a stone flower off a spiky mountain for a couple of Larvitar brothers who want to give it to a female Larvitar.
- Ghost Story: Aptly titled "The Unbearable Suspense of... THE GHOSTSTORY!!! (BOO!)," the chapter centers around Almond telling the Pokemon a story about a man seeing a woman with a bloody face in his house.
- Interspecies Romance: Several Pokemon have crushes on humans.
- Lethal Chef: Jigglypuff
- Lighter and Softer: The most lighthearted ones compared to other Pokemon manga.
- Love Potion: Hazel wants one for Almond so Grandpa uses it to bribe her into catching Pokemon.
- Mad Scientist: Grandpa.
- Miniature Senior Citizens: Grandpa.
- Mood Whiplash: The story "The Hill of the Lone Star Tree" centers around an elderly Quagsire's search for his lost love, with predictably depressing results. This is a far cry from the lighthearted comedy of the rest of the series.
- Scavenger Hunt: One of the events in the Pokemon Sports Meet is this. The Pokemon are each given a picture drawn by Hazel and have to find the item in the picture. Of course, since Hazel is a terrible artist, most of the Pokemon fail the event. The only one to win the event is Jigglypuff, since Hazel's drawing of an umbrella actually looks like one (Jigglypuff brings back a parasol, but Grandpa lets it slide.)
- Shameful Shrinking: Clefairy does this when Almond criticizes him for running as fast as he can to deliver Jigglypuff's message, which still took him all morning long.
- Shrinking Violet: Clefairy literally shrinks when he is upset or someone is critizing him.
- Spotlight-Stealing Squad: Apricot, a female ninja character introduced in the first chapter of volume 8, quickly takes over nearly the entire series, with almost half of volumes 8, 9, and 10 devoted to her love life, to the exclusion of nearly everyone else. Though many people may not know about her anyway, due to the fact that Viz only translated the first seven volumes and then dropped it completely.
- Talking Animal: Zigzagged. The Pokémon seems to talk, but their speeches are translated from their cries.
- Younger Than They Look:
- Ginger is Coconut's grandmother, but looks young enough to pass herself off as an older sister.
- Cashew looks around the same age as Hazel but frets that she's getting too old to be married.