The best Mario and Luigi game by a country mile.
Superstar Saga is like riding a rollercoaster. The game has a breakneck pace that keeps it super engaging throughout its entire runtime.
I love how many twists and turns the story has. It keeps pivoting to more and more insane places. It's like playing a Looney Tunes short. It's a shame that the complete badshitery of the story was toned down in the later games, cause I had so much fun with this one.
It might not be a mechanically or thematically rich as its sequels, but it's pure dumb fun.