Khác biệt giữa bản sửa đổi của “Muggles' Guide to Harry Potter/Magic/Riddikulus”

This spell is of quite limited usefulness, being effective against Boggarts only, at least within our story arc. That said, it is used, as mentioned, a number of times in the series. The fact that Professor Lupin is able to find Boggarts on demand, at least twice and possibly three times during the school year, does indicate that they are relatively common in the Wizarding world. (The story does not specify whether the Boggart used in Lupin's practical final exam is the same one Harry was using for his anti-Dementor spells.)

The author is mute on how Boggarts can be handled in the case where there is no real way to make one's greatest fear seem funny. We see two cases of that in the series: Lupin's greatest fear being the full moon, and Mrs. Weasley's greatest fear being the death of her family members. We note that Lupin does not try to use the Riddikulus spell himself, instead using some wordless form of magic to force the Boggart back into its hiding place, on the two occasions where we see him acting against one.