Hi I'm bored u wanna talk about fishdings to me?
GASP!
Okay so basically, for those who don't know, Fishdings is an au where Gaster is Undyne's dad and Sans doesn't exist. Papyrus is there, but only in a small fight in Waterfall that replaces Shyren's because SHYREN AND LEMON BREAD (although she's called Baked Bread here) REPLACE SANS AND PAPYRUS
So Fishdings Angler had a sister named Shelley who reproduced via Mitosis as you do and decided he too should make a child. Shelley got killed by the Justice child tho. Rip. She left her daughters in the care of their honourary auntcle, Riverperson.
To make his wonderful child, Fishdings combined RAW COSMIC MATTER, A LUMP OF HIMSELF (he can split his tail into legs and can grab off lumps of himself mid split, so thats how) AND GOLDFISH CRACKERS. But OH NO! He accidentally knocked a beaker of JUSTICE DETERMINATION into the mix! (He was studying it)
The child sprung out of the vat a fully formed five year old and immediately beat the shit out of him. He was very impressed at his NEW DAUGHTER'S STRENGTH and immediately took her to the king for training! While she was jabbing at Asgore with a stick, he came up with a wonderful name for her: UNDYNE ANGLER!
Once the newborn fish child got too tired to keep attempting a royal assassination, Fishdings took her to visit her extended family in Waterfall. Riverperson immediately adored their new honourary niece (obviously).
Shyra, six, didn't like Undyne that much at first because she's made of Justice Determination: the same justice determination used by some child to kill her mother. She eventually warmed up to her though, and the two grew up very close.
Shyren, one, loved Undyne from the start and the two would frequently run around the house together shrieking at the tops of their lungs.
Due to Fishdings being busy with SCIENCE and Riverperson with ferrying everyone around on a plank of wood (and also trying to built an actual boat), the Blooks would often babysit the fish children.
Maddy, thirteen is HEAD BABYSITTER! She's also the only one who does any work around here. It's thanks to her that the house hasn't blown up yet. Blanksta, eleven, is no help. They spend all their time in the ruins or on the farm. They are the ruins dummy.
Napsta, ten, is TOO STRESSED to help much. They like playing with Shyren though. Musical baby. They make sick beats together despite being little kids. Hapsta, eight, is even less help than Blanksta in the way that HE CAUSES PROBLEMS ON PURPOSE.
When Undyne is not hanging out with her cousins and the Blooks, she spends time in the lab with her father. The other scientists don't mind her running around the place as long as she's careful.
She also continues training with Asgore! Even though she has webbed hands, she's still pretty good with a spear. She can now beat the ass of anyone in the underground. Except maybe Asgore himself.
She lives on the top floor with her dad for awhile, but when she gets a bit older they move into Shyra and Shyren's place, and buy them a house in Snowdin. By then Shyra's twelve or thirteen so her and Shyren are okay alone most of the day. Besides, there are loads of other kids in Snowdin so they're happy enough. The Blooks still come visit sometimes.
That's all the early Fishdings lore, I think. Nothing else major happens til Undyne's fifteen anyway.
