This trophy is known to be glitchy - in a very bad way. Some players have reported that they unlocked this trophy by completing 250+ levels. However, it seems around 50% of players do not experience the glitch and unlock this without trouble.
Fastest way of obtaining this trophy:1) Text search 'online champ' under the Community menu
2) Complete 100
unique levels, replays do not count
Note: "Just a tip if you search on karting.lbp.me for 1 sec champ you can queue all the different levels up and play them from your queue without being afraid to play the same level. Takes less time then searching for the text all the time." -
JyejitsuThese levels will take literally seconds to complete and there are plenty of them. Remember to 'dive in' to 25 levels and complete them in order to unlock:
And win 25 levels online to unlock:
You can either play legitimately against human players, or you can simply invite a friend and beat them in 25 different levels. Again, the 'online champ' levels are ideal for this.