All else being equal, a bigger engine will make a faster vehicle.
You have to win the Flower Cup on 50cc, 100cc, or 150cc. (If you beat Flower Cup on 50cc, it will not appear on 100cc or 150cc, etc.)
You can restrict its performance but no you cannot change from 100cc to 50cc unless you have a 50cc engine for the same model bike, but requires more work than worth as you would need to downgrade other parts.
Get a trophy in mushroom cup and flower cup!
50cc 100cc 150cc mirror mode.
Get gold in every single cup all 50cc 100cc and 150cc
get a gold in all cups 50cc 100cc and 150 cc
You unlock her in either a 50cc race or a 100cc race in Special Cup.
Just beat 50cc,100cc,150cc and 150cc MIRROR for R.O.B.
Just beat 50cc,100cc,150cc and 150cc MIRROR for R.O.B.
Get the Gold cup in all 50cc , 100cc and 150cc cups
You have to unlock the cups like 50cc! :-)
First You Have To Come First In All Four Of The Cups You Have (The Ones You Started With) Then When You Get The Trophy For First On The Last One You Do Then It Will Say You Unlocked Leaf Cup!