You felt the obligated to take an umbrella from the basket.
Despite being past most of the "rain" in waterfall at this point, you still felt compelled to take the bright pink umbrella with you as you passed, opening it and putting it over your head. Flowey just gave you another look, probably rationalising it as you being the weirdest and stupidest human he'd ever met while giving you this look. You honestly didn't care at this point. Flowey didn't, so why should you? After all, "weird" was you secret codename at this point, and unlike most people who took offence, you embraced it. In your opinion, normal didn't exist, and people could call you weird all they wanted and you would take it as a compliment. You may be weird, but at least it was fun to be weird.
You then found what you were looking for. There was a statue with a curve of stones in front of it, being rained on. You carefully slipped the handle of the open pink umbrella into the statue's hold, and took a step back. Inside the statue, a music box starts to play. You absentmindedly began humming the tune, because you loved it so much, the game's soundtrack was amazing and if there was one song you could depend on to play and make you feel better, despite being in a video game, it was this one. It refreshed memories of your first playthough of Undertale, and how wonderful it was to understand and save all these characters. Though, mostly, it reminded you of Asriel, and how tragic his and Chara's story actually was. It was then you heard someone crying.
Looking at the flower pot in your hands, you could see Flowey shudder every few seconds. Oh. It probably wasn't a good idea to bring Flowey along on your feels trip. You decided to leave at that, you didn't want to give Flowey any worthless pity he would snap at you about when his ordeal was over. The music box's tune slowly began to fade as you progressed, and you decided to take one last detour. Instead of continuing left, you moved to the piano room, deciding to have fun with the little puzzle that the room presented. You put Flowey on the piano's top and sat down, attempting to test the notes on the piano.
Except none of the keys would play.
"Huh," you mumbled. "Idiot. That piano is waterlogged, so its wet strings can't play anything," Flowey grumbled. Waterlogged? Then how could you play it in game? Suddenly, you realise. With a swipe of your hand, you willed you magic little soul laptop back into existence and open its screen. Your screen is set to the piano room, so it's a sign you can access the puzzle. Curiously, you tap the "Z" key on your device.
A piano note plays, not just in the laptop's audio, but, you hear the actual piano in front of you vibrate and sing the note as well. This laptop was really cool. You tap Z again and the note sings its piece. Why could you only beat this puzzle in game? Was it only for players like you to solve, because it was a silly joke waiting in the upper room? This world never ceases to amaze you. And as such, you play the first few notes of "His Theme" on the little piano, technically speaking, and you could hear the wall ahead crumble. Hopefully no one would mind all the detours. You wanted to see this "legendary artifact" for yourself, after all. You closed you magic laptop and made it vanish, grabbed the Flowey Pot and headed ahead to the room in front of you.
It was a rubber ball. Sitting on the stone pedestal in front of you was a bright red rubber ball. No wonder the annoying dog swoops in and takes it in the game. Still, you decide to stick with the script and pick up the artifact. You bounce it around a few times, and it squeaks when it hits the walls or the ground. You decide you want to take it with you, and yet you're carrying too many dogs.
Wait, how did that thought get in your head? You sit in stunned silence, holding the rubber ball, contemplating what had just crossed your mind. Curious, you open your little laptop again and open your inventory. Listed are two items: Plush and Annoying Dog. You definitely saw this one coming. So, you deployed the dog.
You watch the little white dog snatch the ball out of your hand and…absorb it. Honestly, the artifact just kind of…vanished…the moment it touched the dog. You nor your flowery companion could contemplate what had just happened. You could only star in stunned silence as the dog walked through the wall. At least it didn't take your plushie as a chew toy. With all's well that ends well, you decided it was time to leave and really head for the ruins. These delays would probably just annoy everyone at this point.
After another stroll through Snowdin and the forest behind it, you found the door to the ruins wide open. You entered and walked the corridors of Toriel's basement, finding yourself in her home, where everyone was waiting. You carefully handed Flowey back to Frisk and took a seat by the fireplace between Asgore and Frisk. As much as you wanted to sit next to Sans, you could see a hint of distrust still in his eyesockets, despite his ever-present smile. So your inner Sans fan would have to be quelled until you were certain he wouldn't get at you for being the anomaly. After all, he had said it would only slide for a while, and "a while" is an undeterminable amount of time in a situation like this. Though, funnily enough, your position put you across from him. Guess you couldn't quell that inner fan enough.
Toriel enters with slices of pie for everyone. "Oh good, it looks like everyone has arrived!" She cheers happily. "Now then, before we continue, how about you tell us about your exiting journey here, young player?" Toriel asks, her tone sweet. "It was pretty easy-going. No monsters attempted to fight me or anything, Flowey was more well behaved than I was expecting and, well, we should get another fish to look at your piano puzzle, Undyne," you stated.
"Why's that?" Undyne questioned. "Well, a few notes weren't working right. We'd need to call a piano tuna," you replied. Sans and Toriel immediately burst into laughter, Asgore and Alphys chuckled slowly, Undyne gave you a bewildered look and Papyrus screeched. "SANS! HOW DARE YOU INFECT PLAYER WITH YOUR AWFUL, AWFUL PUNS!" the taller skeleton cried. So, apperantly "Player" was your name, now. Well, heck of a lot better than "Anomaly". More laughs and conversation was shared about everyone's day from that point on, until Sans broke the chatter.
"okay, everyone. we've wasted enough time and we need to get back on topic. finding a way into player's world before gaster destroys it."