It might seem strange at first in 7 when racing underwater doesn't clear away Blooper's ink, until you realize that as an aquatic life-form, Blooper would have little use for water-soluble ink.
The Egg 1 in 7 offers a huge underwater speed boost due to eggs and osmosis.
Why is Waluigi Pinball in 7 despite Waluigi not being in the game? To make up for not being able to play on Waluigi Pinball online in Mario Kart DS!
