"What do you mean they're dying! They're too young!" Scootaloo exclaimed.
"I'm sorry but there's nothing we can do. But listen, they would have died awhile ago if you hadn't come to spend time with them." Nurse Redheart said. " They have a tumor growing way too close to they're heart, and with each of them having a specific type of cancer it's not possible for them to be alive now, most ponies just give up hope, but thanks to you they never did."
"Ok I guess I'll just head out. I'll let them know tomorrow, but could you please right down the different cancers they have and who has it before I go." Scoots sadly replied.
On the way home she noticed that two of them she didn't understand. She heard of brain cancer the one Moonbeam has, but melanoma (Constellation) and sarcoma (Night Skys) before. "I'll ask Twilight tomorrow." And with that she was on her way.
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The next morning
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Scoots was on her way to the castle when her friends came up. "Hey Scootaloo what's up." said Sweetie Belle.
"How ya doin Scoots." Apple Bloom spoke.
"Hey girls I'm heading to Twi's, I have to ask her something. Would you like to come along?" Scoots replied.
"Sure." They said in unison.
Stepping into the castle they saw the main 6, all the princesses, Shining Armor, and Spitfire the captain of the wonderbolts. "Hey Twi, can you please tell me what these mean? I don't understand what melanoma and sarcoma is?" Scoots asked.
Twilight looked at her shocked before answering "melanoma is a type of skin cancer, and sarcoma is a cancer that effects a ponies bones and tissue. Why do you ask?"
Scootaloo looked like she saw a spirit just then. "Ok sweets, bloom, I'll be back just wait here ok."
"Okay" they said. And with that she left for the hospital. Once there she saw her sisters and told them the bad news, but also ask if it was alright to go ahead and break the promise she made so she can get them a surprise.
All at once they said "sure".