Sonic Riders: Zero Gravity/Items

Item Boxes

 * Rings: Grants the character extra Rings. The amount can be 10, 20, 30, 50, or 100 Rings.
 * Magnetic Barrier: Grants the character a barrier that will draw in nearby Rings.
 * High Speed: Instantly boosts the character to his/her top speed.
 * Explosion: Launches a bomb ahead of you, harming any rivals far ahead.
 * GP (Gravity Points): Grants the character extra GP to use Gravity Control. The amount can be 10, 20, 30, 50, or 100 GP. Can also grant the character a full GP Gauge (Super Sonic isn't affected by getting GP, unfortunately.).
 * Attack: Causes the character to perform a special attack. Also gives the character access to special shortcuts and Bike/Wheel-type shortcuts.
 * Speed Down: Attaches a steel ball to the character's gear, causing him/her to slow down temporarily.
 * Question Mark: Provides a mystery item.

Note that "Magnetic Barrier", "High Speed", "Attack", and "Speed Down" only last temporarily.

Signs

 * Blue Rail: Accessible with grinding Boards or Skates only.
 * Yellow Feather: Accessible with Air Rides or Yachts only.
 * Red Bike: Accessible only through Attack Mode or riding a Bike or a Wheel.
 * Red Sonic: Only accessible through Gravity Control.
 * Blue Sonic: Only accessible while on foot or in Attack Mode.

Gimmicks

 * Rails: When riding a grinding Board or Skates, your character can grind on these to access new areas.
 * Catapults: When riding an Air Ride or Yacht, your character can be launced off of one to soar through the air.
 * Obstacles: Some obstacles can be smashed while Attacking or riding Bikes/Wheels. Smashing these will usually provide a shortcut that can save a bunch of time during a race.
 * Springboard: Launches you into a new area. These and other special shortuts are only accessible while on foot or in Attack Mode.
 * Dash Panel: Gives you a sudden burst in speed.
 * Trick Ramps: Allows your character to perform a trick by pressing the jump button (see Controls). Pressing it closer to the edge of the ramp will usually result in a higher ranked trick. Tricks can be ranked as "X", "SS", "S", "AA", "A", "B", and "C", with "X" being the best and "C" being the worst.