Psyduck - Default size prints about 10cm, but will scale up or down without issue.

Supports under the beak are tricky to get out, but are needed.

I used a silk red for the heart, and standard PLA for the rest.

This has 5 colours defined, and a pause added at layer 370. Swap the red to black when it pauses, and you'll get black eyes and hair. This lets you get a 5 color print with a 4-slot AMS.

(If you have 2x AMS, you can of course just use the 5 colors and skip the pause)