- Easy rings for Black Market
After getting the Light Shoes (and Crystal Ring to speed up the process), go to the Casino area, and step on the button to make the rings appear. You can do this repeatedly for more begining rings. Notice: The ring limit can exceed 999, but you cannot tell exactly how many you have. Listen for the extra life sound to keep track of them. When you getting as many as desired, go to Emerald Coast, and complete the level without getting hit to be awarded with however many rings you have collected. Go to Chao Garden, then the Black Market, and use the rings there.

- Metal Sonic ('DX' DLC)
Acquire 130 Emblems to unlock Metal Sonic. Select Trial mode, then choose Action Stage, and he will be a playable character. Notice: You must have the the 'DX' bonus DLC.

- Trophies
Successfully complete one of the following tasks to get a trophy:

Bronze Trophies
Knuckles the Echidna	Become friends with Knuckles.
Big the Cat	Become friends with Big.
Sonic the Hedgehog	Clear the Sonic story.
Miles 'Tails' Prower	Become friends with Tails.
Amy Rose	Become friends with Amy.
E-102 'y'	Become friends with E-102.
Super Sonic	Clear all characters stories.
Metal Sonic	Get all 130 Emblems by playing Sonic Adventure DX.
Silver Trophies
The Fastest & Strongest	Get Level A on all the Action Stages.
Sub Game Master	Get all Emblems of the Sub Games.
Metal Sonic Master	Get Level A on all the Action Stages by using Metal Sonic.
The Adventurer	Get all Emblems in the Adventure Field.
Chao's Best Friend	Get all Emblems of the Chao Race.
Gold Trophies
The Perfect Adventurer	Get 130 Emblems.
Mission All Accomplished	Clear all 60 missions.

Bronze Trophies
Metal Sonic	Get all 130 Emblems by playing Sonic Adventure DX.
Silver Trophies
Metal Sonic Master	Get Level A on all the Action Stages by using Metal Sonic.
Gold Trophies
Mission All Accomplished	Clear all 60 missions.

Aren't you satisfied? Do you need help? You can try to leave a comment below, or click here to enter into our Forum.