"Make the jump a success." This objective is satisfied by completing Who is Bigger?.
"I get a little bigger than before... But Adidi's love for me grow even more!"
Upon completion of this quest, Dabidabi's trade items will change, depending on whether the Enlarging Seaweed was given to Dabidabi or Adidi. Adidi's trade items also change if she was given the Enlarging Seaweed; otherwise her trade items remain the same.