Unlock Marill
Unleash a 4+ chain before you defeat Clair. You'll then fight a swimmer who will give you jis PikaBlue, er, Marril.

Unlock Pichu
Fight for about 5 minutes, and you'll be challenged by a Pokéfan, with Pichu as the stakes.

Unlock Togepi
Bust out a 10-block combo , and you'll be challenged by a Pokéfan, with a Togepi as the stakes.