Spongebob/ALVINNN!!! and The Chipmunks

Cast

 * Squidward as Alvin Seville (Both are vain and splendid)
 * Spongebob as Simon Seville (Both start with a letter "S")
 * Patrick Star as Theodore Seville
 * Mr. Krabs as Dave Seville
 * Pearl Krabs as Brittany Miller
 * Sandy Cheeks as Jeanette Miller
 * Mindy as Eleanor Miller
 * Flats the Floundler as Derek Smalls (Both are bullies)