Cave Story HD sprites.

[tsr moderation staff]

i personally think the cs+ sprite is a pretty bad example. they did the exact thing where they made the proportions look odd because they are kept exactly the same as the smaller sprite, which, combined with keeping the shading the same, made it look really flat. Plus they sort of changed a lot of the attitude and general feel of the character but if i get into that I'll start ranting.
If you're going to do an HD sprite, its probably worthwhile to do it from scratch, more of a SFIIHD or monkey island HD thing.