Conversation so far:
How did Berry come up with the song?
after listening to and performing the song "El Loco Cha Cha" with Ricky Rillera and the Rhythm Rockers.
Did it take him long to make it?
CANNOTANSWER.

Question: Did he write it by himself?
Self-contained rewrite: Did Richard Berry write the song Louie Louie by himself?