This episode is a sidestory!  Gintama has been involved in many (one-sided) crossovers.  This time, they're working with the Jump comedy manga Sket Dance!  An episodic anime that airs on Thursdays at 6 PM about a group of three odd jobbers with plenty of laughs and tears...  Sounds very similar to Gintama.  As Gintoki warns that the Sket Dan is coming after Gintama, the Sket Dan members appear and offer a challenge!
We have to find the Pizazz-Pizazz 
Fruit to regain their trust.
Debemos encontrar la fruta Estilo-Estilo para recuperar su confianza.
Temos que achar o Fruto Feliz-Feliz 
para recuperar a confiança deles.