Thesister Stories

Oliver Mousekewits has always dreamed of becoming an explorer like his legendary Uncle Archibald. But when a priceless cookbook written by the great explorer Marco Mousepolo disappears from the Museum of Mouse Island, Oliver's ordinary life changes forever. Joined by Violet of the Thea Sisters, the passionate young chef Rico Parmesan, and the mysterious former Shadow Paw operative Felix Marrow, Oliver uncovers a hidden world of secret passages, forgotten sanctuaries, ancient journals, and centuries-old mysteries buried beneath Mouse Island. Their greatest enemy is the Shadow Paw, a secret organization determined to seize Marco Mousepolo's greatest discovery for its own gain. Leading them is the cold and calculating Lucius Vane, a former explorer who shares a mysterious past with Oliver's missing uncle. From hidden vaults beneath New Mouse City to enchanted islands, singing mountains, and forgotten ruins, every adventure brings Oliver one step closer to uncovering the truth behind the legendary Five Explorers' Sanctuaries, the mysterious Compass of Worlds, and the disappearance of Archibald Mousekewits. With courage, friendship, humor, and a little help from Rico's emergency cheese supplies, Oliver and his friends must solve impossible puzzles, outwit dangerous enemies, and prove that the greatest treasure an explorer can find isn't gold... ...it's the truth.

A tank was discovered this morning on Whale Island . That day it is announced that Mouseford Academy is participating this year in the World Tank Fighting Tournament , a competition in which colleges in several countries are playing the war...The Thea Sisters will voluntarily participate to this dangerous competition and risked their life ?

To celebrate the 600th anniversary of Mouseford Academy , the headmaster and the teachers had chosen the theater of the famouse Romeo and Juliet of William Shakespeare ! The Thea Sisters and Dina hope that one of them will be Juliet .... but the celebration of the 600th anniversary also announces the birth of a new ally , the guardian of the north and the earth , Cardinal Norden !

A mystery that was left to be shattered... In this AU, We follow Pamela Tegene confronting her daughter's boyfriend over something too impossible to be fixed. However, this confrontation has led into a huge fight! Hmmm, I wonder what will happen next!

The Thea Sisters and their friends are playing Dead by Daylight , a popular horror game whose bus is to repair the generators that power the exit door to escape a fearsome killer .

Three sisters, The eldest is the wise, the middle is the safest, and the youngest is the most adventurous. But the youngest has a special trait no one knows.

The Thea Sisters met. Paulina went missing! Oh no! What will happen to her? Is she okay? There is a make-up catastrophe. What happened? What do you mean? There are no such things as make-up catastrophes! Read to find out!

Wendy was always the city's bad girl, after the accident, she dyed her brown hair black, got sleeves and loved only two things: Wendy and Wendy's bike. Aaliyah on the other hand was a slut or as she called it being persuasive. She cared about the "important" things like: clothes, shoes, hair, money and last but not last boys. Lily is like neither of them, she is looks innocent but don't get to close or she is just as bad as the others. Though these girls are very different they have two things in common a hard past and a even harder future.

Rebecca Sabo , a famous editor of Cosmouse magazine , is going to teach at Mouseford Academy . To elated them , she brings in a real supermodel , and organizes a competition . The best photos will be published in Cosmouse . The Thea Sisters organize a photo shoot illico .

An ongoing series about Paulina uploading let's play videos into her gaming YouTube channel. Yes, in the Geronimo Stilton: INTERPOL series, Paulina runs a YouTube channel in between her adventures, her studies, and her missions with The Crew. Each chapter will be a new video uploaded, so stay tuned for new ones.

A major sports championship is being organized in Mouseford ! Gym , diving , fencing and all kind of disciplines ! That's good , the Thea Sisters and their comrades each have their own specialty , and combine friendship with fair play .

This is a revised version of @Julianna_isme's "The Thea Sisters Travel Through Dimensions!". All of the characters belong to their respective owners. The Thea Stilton characters belong to Elisabetta Dami; Adventure Time characters belong to Pendleton Ward; Steven Universe characters belong to Rebecca Sugar; and the Gravity Falls characters belong to... (actually I can't remember who created Gravity Falls, anyway, moving on!) Cringe bomb warning, by the way!

RANKINGS: #6 in MousefordAcademy, #64 in TheaStilton, #32 in TheaSisters and #90 in GeronimoStilton (of March 2025) The days of steady waiting is finally over!! Come and join Nicky, Colette, Violet and a few other students as they come together to answer your questions and facts about anything that lingers the noggin! ...Well, except for inappropriate shipping... Anyways, please make sure that your questions are friendly, we DO NOT allow any ill-suited questions or dares, including LGBT shipping. DISCLAIMER CORNER: I don't own these characters; these characters belong to their rightful owner. Any order in any different fonts will be dedicated to the audience, certain things like (favorite things, hobbies, facts, etc.) The characters' names in bold will be the characters talking off-screen/behind the scenes. Names that are in movies, TV Shows, books or music they listen to would also be bold and underlined. These will be the "original" Thea Sisters and other characters to the franchise. Now that we've gotten that out of the way, TIME FOR SOME QUESTIONS!!!!

Miss kelaya... I looked back and see a man walks like a mafia boss who owns everything and has dark aura at the same time. And it looks like he was born for it. To be honest he is good-looking and handsome, but be careful beautiful face can deceive anything to get everything.

So this book is not really a serious one, it's just a book for me to post some art because I feel like it and some of you guys liked the idea. This could either be artworks based on events in our vlogs, some stuff I could be proud of, or it could be me knocking my ego a notch or two by posting some of my disgracefully embarrassing old art. Yes, those characters on the cover are my avatars across the years, and yes, I die inside every time I look at my first avatar.

When they come across a little fox injured in the forest , the Tea Sisters immediately take it to the veterinary clinic . They discover a warm place , where all kinds of residents are cared for and pampered : big rabbits on a diet , a parrot with a broken wing , sheep convalescing... Touched , Nicky , Pamela , Violet , Colette , Paulina and the others decide to give veterinarian Olly Hope a helping paw !

The Thea Sisters and their friends are thrilled with the new dance and song program offered at Mouseford Academy . Until they met the head of the new course , the strict and famous ballerina , who directed more than thirty shows , Camille Ratyshnikov . But the five friends , as well as their allies , are unaware that Mrs. Ratyshnikov has scores to settle with Mouseford Academy . The turmoil of battle awakened a star in the constellation , Star Cepheus .

At Mouseford Academy , transforms into a location for a film adaptation of a novel book , Two Mice in the Moonlight . Each of the Thea Sisters enjoy these unforgettable moments . A love affair was born between actor Dylan Ratinson and a student from Mouseford . But once again an enemy strikes . On the battlefield board , a new ally was born , the representative of the Constellation of the Chained Princess , Star Andromeda .