Mario and Luigi just defeated Bowser for a second time and pop out of the hole.
Mario: Yippee! Now we can go to the top floor!
Luigi: I wanna go to Dire, Dire Docks again.
Mario: Why? We just went a while ago.
Luigi: Yes, but there is something I want to see.
Mario: Fine. Let's-a go.
Mario and Luigi jump into the wobbly water wall and get teleported to Dire, Dire Docks in midair.
Luigi: AAhhhh!!!
Splash!
Mario: Geez! When will you remember?!
Luigi: ...
Mario: So where do you want to go?
Luigi: Where the sub is.
Mario: Ok.
Mario and Luigi swim to the tunnel entrance but Luigi gets caught by the whirlpool.
Luigi: AGWAGWAGWA!!!
Mario: Oh great.
Luigi gets thrown out of the course. He is now back in the castle.
Luigi: Mamamiaaa. Stupid whirlpool!
Luigi re-enters. Mario is waiting for him while collecting coins to keep his air supply up.
Mario: There you are, now let's go!
(Luigi get's caught in the whilpool again.)
Mario: Oh brother.
Luigi gets thrown out fo the course again, and re-enters.
Mario: Finaly! Now let's-
Luigi get's caught again.
Mario: AH forget it! I'll go alone!
Mario starts swimming through the tunnel and makes his way to the sub area.
Mario: Hmm... something's missing here. Where's the submarine?!
(Mario notices poles moving high above him, along with red coins.)
Mario: Hey! Those poles weren't there before. How can I get up there? ... Of course! The big purple switch. I remember seeing another set of blocks appear when it was pressed.
Mario makes his way to the switch, presses it, and climbs the blocks all the way to the left floating platform, claiming the first coin.
Mario: Yippee! Now to do some pole jumping!
Meanwhile...
Luigi: Come on... Come on... I can do it...
(Luigi gets caught in the whirlpool again.)
Luigi: Aw man.
By now, Mario has claimed the four coins on the left side and is hanging on the pole where the star marker is. He arrives and jumps off.
Mario: This is easy. Now to that lonely coin way over there.
(Mario jumps on the pole and gets taken to the platform with the blue coin switch, then takes the next pole to the red coin. He then heads back to the platfrom with the star marker.)
Mario: Now for those last three over there.
Meanwhile...
Luigi: That's IT! I'm making it this time! Swim Luigi, SWIM!!!
Luigi finally manages to make it to the tunnel and starts for the sub area. By this time, however, Mario has collected the remaining three red coins.
Mario: YES! Now to get the Star!
Mario jumps from pole to pole and lands by the star marker, claiming the Star. Then we here the Star music.
Mario: Here we GO!
Luigi enters the room.
Luigi: I'm here! What did I miss?
Mario: Pretty much everything.
Luigi: WHAT?!
Mario: Yup. There were poles and red coins and that's about it.
Luigi: ... I see. Where's the sub?
Mario: It's gone.
Luigi: What do you mean it's gone?
Mario: It's gone!
Luigi: How?!
Mario: I don't know how. It's just gone! Now, next Star, here we come!
Luigi: Don't you mean, on to the next Star?
Mario: Whatever. Let's go.
Luigi: ...