This is the Polygon in Ultimatrix Unleashed. You may be looking for the other one.
Polygon is an alien that can shapeshift into anything.
He first appeared in Bivalvin and Bubbles Too!
He can turn into any shape and size he wants! Polygon can throw shapes at enemys
His only weakness is changing shape too much!
Planet and Species
His species is the Polychangers and they have no home planet because they usally blend in on a planet with you.
Ultimate Polygon (not much is known)