You want to catch that rare albino platypus from the tower?
First, you need a trap. The platypus basket will suffice. You can put it on the scaffold.
Well, you need a bait.
Did you check the bulletin board outside. It is next to admin office.
About sharing a lunch? You should find the "Romantic Ninja".
Go to the lecture hall and use the note on the students. You get a nice fresh sandwich. That is your bait.
The sandwich should be older. But you don't have time to wait.
Right! Stick the sandwich into the small anomaly. It will get older, just like platypuses like it.
Put the bait into the platypus basket and put the basket on the scaffold. That's how you trap a platypus.