finaly got the Bowlers Brothers ! Use Letter F, do a 42sec front wheelie at the beginning and try not to finish last. It works, I managed it even with crashing once.
Dude! You just completed the Fish Thankfulness achievement in Dolphin Olympics 2 and won the Fish Thankfulness badge and 60 points!
Dear God took me 2 months to get that one!
One advice guys, keep trying !
 "CycloManiacs"){kind=icon}
 "Gravitee 2"){kind=icon}
 "William and Sly"){kind=icon}
 "The Way of the Exploding Cow - Milk Crisis"){kind=icon}
 "1 Will Survive"){kind=icon}
 "Dolphin Olympics 2"){kind=icon}
 "Perfect Balance: New Trials"){kind=icon}