Bowser Castle 2 is the final course in the Flower Cup. It is longer and more dangerous than its predecessor with numerous gaps over lava, especially midway through the course. Some of these have fireballs that are shot up in the air. If it hits a kart, the driver either spin out or fall straight into the lava. The gaps on the steel wire near the end are particularly dangerous since most of them require a mushroom to hop. Dash panels are located near the sides of a few areas. Other than that, Thwomps and 90 degree turns round out across the deadly course.

MarioKartDS GBABowserCastle2

A screenshot from Mario Kart DS

It returns in Mario Kart DS as the third track of the Banana Cup, adding spikes to the Thwomps, increasing the railings' height and modifying the jumps' difficulty. Only the latter affects gameplay, with some shortcuts no longer work. Missions 4-5 and 5-4 take place here. Both missions use Bowser. 4-5 features him having to collect 15 coins without getting squished by a Thwomp (They have added a lot of them along a straightway). 5-4 has him driving through 10 gates in order. The retro course's staff ghost uses Bowser in the Standard BW and Dry Bones in the Banisher.
Previous track:
Cheese Land
Current track:
Bowser Castle 2
Next track:
Luigi Circuit
Previous track:
N64 Frappe Snowland
Recently reappeared in:
Mario Kart DS
Next track:
GCN Baby Park