Some of the character pages are messed up. Each should look like this:
Summary[]
At the top, write a brief description of the character. This includes their weight class(es). Add a picture of that character at reasonable size.
Characteristics[]
Here, put how they look in detail (see Rosalina) and any special traits they have.
Appearances in the Mario Kart series[]
Here, put (in a bullet list and with links) the games that character appears in.
Karts[]
Put the karts that character can use.
How to Unlock[]
If the character is unlockable in one or more games, then put a sub-heading for each game and under that, put how to unlock them.
Gallery[]
If there are more than one pictures of the character, put them in a gallery here.
Trivia[]
Put any special information that doesn't fit into any other section here. Make sure this is relevant to the topic.