SONIC UNLEASHED

Unmissable! This unlocks with regular story gameplay… here are some details

ripped from Kevinnummer1 on psnprofiles

https://psnprofiles.com/Kevinnummer1


For this (achievement) you need to fully restore the sixth continent. The sixth continent contains 2 levels including a boss battle at the end. The continent contains the following levels:
Jungle Joyride Day Act 1 (Adabat Hub)
Boss - Egg Lancer (Adabat Hub)

During the levels you should try to get as many medals as possible, because it will save you a lot of time at the end of the game. Once you have beaten Egg Lancer, the trophy will unlock after a short cutscene.

Walkthrough Boss - Egg Lancer:
Much like Eggman's other bosses bots, the Lancer makes use of lasers the Sonic needs to stay away from. Use quick step to dodge as well as pick up medals along the way and try to get a homing attack in before the fight goes up. When the fight moves up the walls, jumping is out of the question! Continue to quick step around the laser columns and when the view switches overhead, stay between the beams it fires. Back on solid ground jump over the horizontal beams and dodge the vertical ones to close in for another hit on the Lancer. As Sonic hits the blue springs you'll need to hit the right buttons to hit all the spring pads (and get a moon medal), before the final spring where a quick time event occurs. Hit the right buttons and score massive damage against the boss. Like with other bosses, the pattern repeats and after taking enough damage, its attacks become more aggressive. Keep the pressure on though and the Egg Lancer should drop on the third rotation.

https://www.youtube.com/embed/pY06chD04kw