DreamWorks All-Star Kart Racing

This is unlocked in the Challenge mode

From the Main Menu, go to Single Player, Challenges

You will need to complete enough challenges in Tier 1 & 2 to be able to get to Tier 3, Challenge 2

In the event, get a turbo start, then hit the boost pads on the stairs, then get a drift boost on the next 2 corners

When entering the room, the Golden Dolphin is at the end in a centred boost pad/ jump area, however, it is protected by lasers

If you keep to right and hit the 2 x jumps with padlocks over them you will de-activate 2 of the lasers, you may get lucky and the AI will de-activate the 3rd, but if not, avoid the remaining laser and hit the jump to collect the Golden Dolphin

The achievement will pop straight away as long as you have collected it within the time limit