I will create underevent quality undertale battle sprites for you

No, that would become too complex way too quick and take a long period of time, i offer standalone coloured pictures but any sheets will be in the undertale style.

Not at all, I can draw a diverse range of characters in my styles, even if i do focus on cats and skeletons. Complex character designs however might take longer if they have accessories or numerous additional body parts and might need to be simplified.

Animations consist of the character doing something, example being Sans moving his arms up and down and all around, but can include other animations such as picking up an item, summoning an item, doing a disbelief backbone thingy or swinging a weapon like asgore.

Hopefully yours, but my work is most common in the KP!DD Series, Dust!Murder Time trio, and a handful of omnilovanias, I have also done sprites for friends but have not been publicised.