Joe Danger

This basically means collect all 4 stars in one event. This is obviously impossible to do if the event only offers 3 stars, but some events offer up to 7+ stars, such as 'Fourth Tour: High Voltage, First Event: The Edge'. You can easily get 4 stars here, such as a Danger Star, 2 Hidden Stars, and time limit or combo Stars. Some you can't do to them being in different lanes. There are other events where this is achievable besides the one listed above - there may be another that is easier for you.

This trophy is also achievable within Sandbox mode. Create a very short level, add a few mini stars, coins to collect, a ramp, a target and a finish line. If you start the race on this custom track by pulling a wheelie all the way to the finish line, collecting all stars and dash coins, and landing on the target, you will get 4 stars and the trophy.