Miles 'Tails' Prower
Become friends with Tails.
This will be the first trophy you will obtain, just complete the first level "Emerald Coast" which is only a few minutes after the first boss fight "Chaos 0". This level isn't tough, and very straightforward. Once you complete the level and have the cutscene with Tails, you'll be back at the pool and the trophy will unlock.
Knuckles the Echidna
Become friends with Knuckles.
First you must complete the level "Ice Cap" in the Mystic Ruins. When you leave the ruins, go near the pond area of the Mystic Ruins. You'll get a small cutscene and fight Knuckles. He isn't tough at all, and takes about 3 hits to defeat. After that you'll get a cutscene and fight "Chaos 4". He is simple to dodge, just jump around and wait for his head to pop up above the water. He takes about 4 hits to defeat and once you defeat him, you'll get a cutscene, and after that the trophy will unlock.
Become friends with Amy.
You'll get this shortly after the Sub Game "Sky Chase Act 1", once you finish the level, you'll be in the hotel area, walk out and you'll encounter Amy. After the cutscene you will get the trophy.
Become friends with E-102.
Once you're on the Egg Carrier, go to the level "Sky Deck". Once you complete the level, go to the hovercraft. You'll get a cutscene and fight E-102. He takes about 3 hits to defeat, once you defeat him, you'll get a cutscene and after that you'll get the trophy.
Big the Cat
Become friends with Big.
You will obtain this shortly after " E-102 'y'
[COLOR=sienna][COLOR=black]". Once you regain control of Sonic after the cutscene with E-102, you need to go into the tower and put the Egg Carrier back into it's original form. After that, go forward onto the platform to face "Chaos 6
He isn't very hard, the key to damaging him is the robots Eggman throws at you. Get Chaos 6 to suck them up and he'll freeze over and you can use your homing attack against him. He takes about 5 hits to defeat and once you defeat him, you'll get a cutscene and after that you'll get the trophy.
Sonic the Hedgehog
Clear the Sonic story.
Just complete the 10 levels and 5 bosses (I think, change this if it's wrong) in Sonic's story.There shouldn't be anything too hard. Watch these if you get stuck.
Clear all characters stories.
This is an easy trophy. The only story mode you should have any trouble with is Big's.
The Fastest & Strongest
Get Level A on all the Action Stages.
Sonic: Sonic's levels are fairly easy to get level A on. All you have to do is beat the level for LEVEL C. Then you need to complete the level again, but with 50 rings when you destroy the capsule for LEVEL B. Then, for LEVEL A, you have to complete the level below a certain amount of time.
Tails: Tails' levels are also easy to receive level A. Complete the level for LEVEL C. Then complete the level with 50 rings for LEVEL B. Then for LEVEL A, all you have to do is beat a faster Sonic.
Sub Game Master
Get all Emblems of the Sub Games.
Chao's Best Friend
Get all Emblems of the Chao Race.
This is easyiest if starting early I recommand you drop by every time you finsh a stage and keep giving your chao animals to level up. Save your rings for when you complete all the stories because you will hopefully have 2500+ and can buy the best fruit/level up even quicker.
Whoever you use DOES NOT effect the chao like in Sonic Adventure 2 so pick which ever character you like!
Follow this video for very useful informations about Chao skills and how to raise those skills.
You will easily win the beginer races with just 300 in each skill. For jewel races, raise to 1000 each. From most important to less important :
Run, Swim, Stamina (For the longer race), Power (One race depends only on it), Fly (almost useless)
Also remember that races events are random (such as chaos using shortcuts). Also if you start a race while your Chao is sleeping, the chao will start the race sleeping lossing precious seconds.
Good luck !
Get all Emblems in the Adventure Field.
Just follow this video.
The Perfect Adventurer
Get 130 Emblems.
This is the most frustrating trophy. Getting all 130 emblems WILL take a while.
This is basically the Sonic Adventure platinum, since the silver trophies are for getting the emblems.