Many people keep asking about how to do this, after I created an adventure that feature "statues". These were actually Blue Gates disguised as creatures. You can disguise almost any object as a creature if you follow a few simple steps.
- Add a gate (or another disguisable object) to your gameplay objects page.
- Click on the option to disguise it.
- When the editor opens up the Sporepedia, instead of selecting a building or vehicle and clicking OK, choose a creation and click the edit option (one of the bottom right buttons on the Sporepedia).
- Inside the edit mode of the building or vehicle, click the Sporepedia button on the bottom left of the screen.
- Use the Sporepedia filters to find the creature you want, choose it and again click the edit option.
- Inside the edit mode of the creature, just click OK (the green "V" option).
Voilá!