Some of u may know that I post my drawings here, but I'm running out of ideas anyone want to suggest anything? I will also mention your name if I get around to doing your suggestion :)

u could draw scenes from the tv shows. Like this one from Operation Cooties.

Maybe u can draw a group of POM character with your OC that dressed with different national costume...

For example u can draw Hans with Danish traditional uniform (if there's any, but i don't know yet), Private with British royal Uniform, Skipper with America flagged T-Shirt of even King Julien with Madagascar costume (Like in Movie)...

I have an example with OC costume >>
And here is Sergeant (Cpt. Taylor) With Danish Infantry Uniform (Actually Fidelis Uniform)

hmm.... maybe u can draw Blowhole...but with an added twist. draw him as Flippy

Could u try to draw my OC, Palm? Here's my drawing of her: link
If u don't think u can do it, it's fine.
Maybe try to creatate a charactor doing something no one would ever think of them doing! (example: Skipper watching Lunicorns)

first of all, are u able to draw humans?

try drawing them one of all of the penguins with a special background. i've done that recently. here's an example
link

I was thinking maybe a Doris and Kowalski pairing pic,don't know if you've already done one.