Shugo Chara! (2007) : 3x2

The anime starts with Rikka, the new transfer student, waking up with dozens of X Eggs trying to wake her. She tries to purify the eggs from remembering Amu doing Open Heart in the previous episode, but failed. When she was walking to school she found yet another X Egg and tries to take care of it. In the Royal Garden, Tsukasa introduces the Guardians a new transfer student in 1st grade, Hikaru. Tsukasa tells the guardians that Hikaru will be a Guardian Apprentice for the time being until the other Guardians graduate. Later, they visit the sports field where Nagihiko tells Hikaru about Basketball. He challenges him to a one-on-one match, full court. Rima states that Hikaru, being a 1st grader, has no chance against Nagihiko, who is a 6th grader.