Undertale: All Yellow Monster Descriptions Guide

Froggit: compliment + spare
Whimsun: console + spare
Moldsmal: flirt + spare
Loox: don’t pick on + spare
Migosp: talk (when it is alone) + spare
Vegetoid: dinner (make sure to touch the green attacks) + spare
Napstablook: cheer X4

Ice cap: ignore X2 + steal + compliment + spare
Snowdrake: check + laugh + spare
Doggo: check(do not get hit) + pet + spare
Gyftrot: undecorate X3 + spare
Lesser Dog: pet X6 + spare
Greater Dog: beckon + pet + play + pet X2 + spare
Dogamy and Dogaressa: roll around + re-sniff + pet Dogamy + pet Dogaressa + spare

Woshua: clean (touch green attacks) + spare
Aaron: when you leave from Napstablook’s house keep a CD playing, then you will come across Aaron and Woshua and a cutscene will play
Shyren: hum X5
Moldbygg: unhug + spare
Temmie: talk + spare
Mad Dummy: talk + (anything until Napstablook comes)

Vulkin: hug / encourage + spare
Tsunderplane: approach (make sure to touch four of the green attacks) + spare
Pyrope: heat up X2 + spare
Royal Guards: RG2 clean armor (clean RG2’s armor by touching the green attack) + RG1 whisper
Final Froggit: mystify + spare
Whimsalot: pray + spare
Astigmatism: (do anything for the first turn) + pick on / don’t pick on (do what Astigmatism tells you to do, not the opposite) + spare
Madjick: talk / stare X2 + spare
Knight Knight: sing X2 (if you did not act correctly with Shyren then sing X3) + spare (if you need to sing X3 then you have lost Shyren’s yellow description)

Memoryhead: cell + refuse + spare
Endogeny: beckon + pet + play + pet X2 + spare
Lemon Bread: unhug + flex + hum + spare
Snowdrake Parent: joke X3 + spare
Bird: mystify + pray + pick on + spare

And that’s all the monsters with obtainable yellow descriptions in the credits scene for the true pacifist ending, thank you for reading my first guide ever.