a few days ago i completed yoshi island the last level was quite easy and fun it has 3 bosses first baby bowser beat him up then bowser hit him with an egg slam him on the stomach a few times beat him then kamek turns him to mega bowser (he is huge) then the other yoshis have the babies that you didnt use and a balloon comes in with mega eggs throw them at him quite alot and it is done. so i unlocked the time trial mode. that was that. hope they release anther yoshi island but we will have to wait and see