Sushi Ralph is the second questline for the Level 52 content update that was released on May 6, 2015. In order to complete it, the Player needs Akira that is unlocked after purchasing The Happy Sumo.
"Now Ralphie, apparently you are aging out of day care and our attempts to make you a latchkey kid have failed horribly."
"Keys taste delicious but I don't like what they unlock in my tummy."
"Luckily for us, the Happy Sumo has opened up this unpaid sushi internship for kids."
"It sounds like this program breaks any number of laws, but I'm no expert in what's legal and illegal, so I'll just focus on the positive - all the free ginger I can eat!"
"Looks like it was tainted Krusty Burgers... which apparently everyone in town ate after their sushi because pieces of raw fish on rice just don't really fill you up."
"I wish you had told me that before I fell upon my sword to defend my honor. Little help, please?"
"Wait, I didn't eat any Krusty Burger last night. Why do I still feel sick?"
"Mr. Simpson, after pumping your stomach we found several Krusty Burgers, some still in their wrappers. We also found six pounds of shrimp scampi, $8.50 in loose change, and-"
"Alright, alright, you've made your point. Now I'll take my $8.50 and my shrimp scampi and be on my way."
"Seriously, I could really use some medical attention."