Urbz: The Sims in the City, The Xbox Cheats

Acquire Skill:
L + BLACK + RIGHT + X + LEFT

Max Phystical:
L + R + A + DOWN + BLACK

Unlock all Socials:
BLACK, UP (left stick), Y, DOWN (D-Pad), R

Unlock the Cheat Gnome:
LEFT + Y + DOWN + A + X

Max Mental:
L + B + A + BLACK + DOWN

Max Artistic:
Y + DOWN + BLACK + A + B

Power Social:
DOWN + BLACK + RIGHT + X + LEFT

Team Photo:
UP + DOWN + X + UP + DOWN (on credits screen)